UK Market Breakdown: Gilts at 6% Erase FTSE Gains, Week of 5 October 2026

London's blue chips spent the first half of the week clawing back ground lost in late September, then handed all of it back in a single session. The FTSE 100 closed Wednesday at 10,458.50, down 83.19 points or 0.79% on the day — and within three and a half points of where it finished the previous Friday, at 10,461.95. Three completed sessions, and the index has gone nowhere.

Wednesday's damage came from the gilt market. The 30-year yield rose around 11 basis points to 6%, matching the level it reached the previous week, which was its highest since 1998. That hit the rate-sensitive and Asia-exposed end of the index hard: Prudential fell 4.60%, Standard Chartered 4.51% and HSBC 4.24%, the last of those also absorbing a Financial Times report that it plans deep job cuts in its UK wealth arm.

Underneath the flat index, it was a busy week for corporate news. Informa agreed a £2.24bn deal for Clarion Events, BT Group bought TalkTalk out of administration within hours of it being placed there, and Asos lost roughly a tenth of its value after hackers appeared to hijack its own app notifications.

The FTSE 100

The week opened on a firmer note. On Monday the index rose 0.34% to 10,497.94, steadying after five days in which it had fallen about 2.2% — its worst week since April — as global bond yields surged.

Tuesday was better again, with the index adding 43.75 points, or 0.42%, to 10,541.69, having traded as high as 10,602.57. Two things helped. Brent crude slipped 1.1% to $99.19 a barrel, back below $100, which Sharecast attributed to resilient Middle Eastern exports and a G7 emergency stockpile release. Gilt yields also eased, taking some pressure off the banks.

Wednesday reversed both legs of that. Brent was back above $101 at the London open, the 30-year gilt yield returned to 6%, and the US 10-year Treasury yield sat near 5.32%, after touching 5.35% on Monday — its highest since April 2002. The index opened at 10,542.18, which proved to be the session high, and drifted lower all day, reaching 10,445.42 at its worst.

Financials, utilities and miners did the bulk of the damage. Alongside the Asia-focused lenders, metals prices slid, with Antofagasta down 3.47%, Endeavour Mining 3.18% and Anglo American 2.82% in intraday trade. Weakness in Hong Kong, where the Hang Seng fell 0.62%, compounded the pressure on London-listed banks with large Asian earnings bases.

The FTSE 250 and mid caps

The mid-cap index finished Wednesday at 24,036.75, down 0.7% on the day according to Share Talk. That was marginally less bad than the FTSE 100's 0.79% fall, but from a weaker base: the FTSE 250 had dropped 1.6% to 24,143.21 on 1 October, when the 30-year gilt yield first broke 6%, and it has not recovered that ground.

The sensitivity is mechanical. The FTSE 250 is far more domestically exposed than the blue chips, so UK borrowing costs feed directly into its constituents, and higher gilt and swap rates keep mortgage pricing elevated. That is why housebuilders have been among the most reactive names throughout this bond sell-off. Bellway, which reports full-year results next week, has already flagged that its private reservation rate fell to 131 homes a week from 139, with a forward order book of £1.20bn against £1.52bn a year earlier.

It was not all one way. Hollywood Bowl jumped close to 7% on Wednesday morning on record annual revenue, and Unite Group is due a trading statement on Thursday. The largest mid-cap move of the week, though, was downwards: Asos fell 10.6% on Tuesday. Both are covered below.

On AIM, nothing inside Monday to Wednesday matched those for scale, though Proactive Investors noted on 2 October that a 0.5% rise in the AIM All-Share had halted several weeks of selling in the junior market.

The week's biggest movers

Asos (ASC.L) produced the week's most dramatic move. On Tuesday, app users in the UK, United States, Germany and Australia received a push notification headed "ASOS HACKED", addressed to the retailer's data protection officer and IT team, claiming attackers had compromised its Snowflake cloud data instance and directing the company to a Telegram contact. One report linked the message to a group calling itself Xuanye Group. The shares fell as much as 13.2% intraday and closed down 10.6% at 449p, which Bloomberg described as the biggest one-day slump in a year. Asos has not confirmed a breach, said it was investigating, and said it did not believe customer passwords or payment information were at risk.

Prudential (PRU.L) and Standard Chartered (STAN.L) were the FTSE 100's worst performers on Wednesday, down 4.60% and 4.51%. Neither carried company-specific news. Both are geared to Asian markets and to long-term interest rates, and both were caught by the combination of a 6% long gilt yield, a firmer dollar and the fall in Hong Kong.

HSBC (HSBA.L) fell 4.24% on Wednesday. The Financial Times reported the bank plans to cut around half of the management and specialist roles in its UK wealth division, and to reduce financial adviser numbers by up to roughly 70%, as part of a push into AI, with affected staff expected to leave at the end of October. HSBC did not deny the report, and a consultation is under way.

BAE Systems (BA.L) led a sharp sell-off across UK defence on Tuesday, falling around 4.1%, after The Times reported that the Prime Minister was weighing a delay to the roadmap for lifting defence spending to 3% of GDP. Rolls-Royce fell 2.7%, Babcock International 2.1%, and QinetiQ also declined. The Treasury denied the report, saying the date of the spending review had not been set and calling the story "pure rumour and speculation".

Hollywood Bowl (BOWL.L) moved the other way, rising 6.69% to 263.00p by 08:53 on Wednesday from a previous close of 246.50p, after reporting a record annual revenue figure.

JD Sports (JD.L) was the standout FTSE 100 riser on Wednesday, up 3.04% at 82.78p by midday. That followed a punishing start to the month: the retailer cut full-year guidance on 1 October to £700m-£800m of pre-tax profit before adjusting items, and the shares closed almost 15% lower at 79p that day. No fresh company announcement accompanied Wednesday's move.

Company news in focus

BT Group delivered the week's first significant deal. On Monday, TalkTalk Telecommunications and PlatformX Communications were placed into administration by Alvarez & Marsal and immediately sold to BT on a debt-free basis. The consideration was not disclosed, but BT put the total cash impact in its 2027 financial year at about £400m — a figure bundling the price, transaction and administration costs, working capital, roughly £60m of trading losses and about £100m of payments TalkTalk had been making to Openreach that BT will no longer receive. BT reconfirmed its financial outlook and said the acquisition would be earnings-accretive only over time. The shares rose about 1%, with Reuters putting the gain at 1.2%.

The deal is not cleared. The Competition and Markets Authority has served a pre-emptive action order on the completed acquisition, and the government issued a public-interest notice that BT said enables "a swifter regulatory review". Virgin Media objected publicly, saying the arrangement had "all the characteristics of a stitch-up masked as a rescue deal in the public interest".

Informa agreed on Tuesday to buy Clarion Events from Blackstone at an enterprise value of £2.24bn in cash, part-funded by a £940m equity raise alongside a retail offer, with its buyback paused. The company also set out plans to spin off Taylor & Francis, and said it expects the transaction to add a mid-single-digit percentage to 2027 adjusted diluted earnings per share. Completion is expected towards the end of the fourth quarter, subject to approvals.

Metlen Energy & Metals announced a long-term gallium supply agreement on Monday with an unnamed major Japanese chemical company, covering up to 16% of annual output from its Greek facility, which is still under construction. With a July agreement covering about 25% of output, roughly 41% of production from the 50-tonne-a-year plant is pre-sold ahead of commercial production planned for the third quarter of 2027. Metlen moved its primary listing from Athens to London in 2025; its London line is quoted in euros, not pence, and closed at €49.68 on Tuesday.

Earnings and trading updates

Early October is a quiet stretch of the UK reporting calendar, and the three sessions produced one substantial set of numbers.

Hollywood Bowl issued a full-year trading statement on Wednesday morning covering the year to 30 September. Group revenue rose 4.3% to a record £261.6m, made up of UK revenue up 3.5% at £219.9m and Canadian revenue up 9.0% at £41.7m. The growth came from new sites rather than existing ones: like-for-like revenue fell 1% across the group and 1.4% in the UK, which the company attributed mainly to weather in the second half. Adjusted pre-tax profit is expected to be in line with market expectations, and the company's own compiled consensus of eight analysts ranged from £48.0m to £53.2m, with a mean of £51.0m. Four new centres opened during the year, taking the estate to 95, with eight more planned this year, taking it to 103. Full-year results are due in December.

The flow was otherwise thin, and the most relevant recent updates sit just outside the window. Greggs reported third-quarter sales growth of 7.7% and like-for-like shop sales up 3.4% on 30 September, alongside a proposal to consolidate manufacturing that places four sites and around 740 roles under consultation. Bellway's full-year results are not due until 13 October, but the housebuilder has guided to underlying operating profit of £320m-£330m for the year to July, against £304m the year before, on completions of 9,695 homes versus 8,749.

Macro and the Bank of England

The gilt market dominated, and it is now as much a domestic policy and fiscal story as a global one. The 30-year yield returned to 6% on Wednesday, up around 11 basis points, matching the multi-decade high set the previous week when it reached 6.029% — the highest since January 1998. The 10-year stood at 5.40% on Tuesday, having touched 5.5% the week before, its highest since July 2007.

Rate expectations hardened. Bank Rate stands at 3.75%, and three Monetary Policy Committee members voted for 4% at the 17 September meeting. On Tuesday, the MPC's Catherine Mann said inflation above the Bank's 2% target appeared to have become embedded in the economy, and warned it could reach 4% around the turn of the year. Markets were pricing an 87% probability of a hike at the 5 November meeting.

Sterling drew little benefit. The pound gained about 0.40% on Tuesday as the dollar retreated from multi-month highs, helped by Mann's remarks, but fell 0.37% to $1.3227 on Wednesday, leaving it close to three-month lows as the rebound in oil revived inflation concerns.

The one piece of hard UK data inside the window was Tuesday's S&P Global construction PMI for September, which rose to 46.1 from 44.3 — still contraction, but the shallowest in eight months. Housing was the weakest sub-sector at 40.7 against commercial work at 48.5, new orders fell at their fastest pace since June, and job shedding was the quickest in five months.

Still to come

Tesco's interim figures are the immediate test. Analysts were looking for first-half revenue up 3.1% at £37.2bn, with full-year adjusted operating profit guidance of £3.0bn-£3.3bn expected to be left unchanged.

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