The City of London skyline. Britain's biggest banks lost more than £18bn in market value on Thursday after investors learned the Chancellor had summoned their chief executives to talks. Photo: David Iliff / Wikimedia Commons (CC BY-SA 3.0). Representative image.

£18bn Wiped Off UK Banks as Chancellor Summons Bosses to Pre-Budget Talks

The City suffered its worst day in months on Thursday as more than £18bn was wiped off the value of Britain's biggest banks, after investors learned that the Chancellor has summoned the bosses of the country's leading lenders to a meeting at the Treasury next week.

The sell-off began in early trading as bank investors worried about surging government bond yields, then accelerated through the afternoon once it emerged that John Healey had called the chief executives of Barclays, HSBC, Lloyds and NatWest to talks on Tuesday. It is the first such in-person meeting the Chancellor has held with the banks' chiefs since taking office, and it comes three weeks before he delivers his first Budget on 28 October.

Key facts

• What happened: More than £18bn was wiped off the combined value of Barclays, HSBC, Lloyds and NatWest on Thursday 1 October.
• The trigger: Sky News reported that Chancellor John Healey had summoned the chief executives of the big four banks to a meeting on Tuesday 6 October.
• Why markets panicked: Investors read the summons as a signal that Healey may be preparing to raise taxes on banks in his Budget on 28 October.
• The scale of the falls: Barclays closed down 4.1 per cent, HSBC fell 4.1 per cent, Lloyds lost 4.5 per cent and NatWest finished 5.4 per cent lower.
• The gilt backdrop: UK government bond yields hit 6.07 per cent on Thursday morning, the highest since 1998, in a global bond sell-off.
• What is not known: The Treasury did not comment, and the agenda for Tuesday's meeting has not been disclosed.

A brutal day for the big four

The numbers tell the story. HSBC, the largest of the four by market value, bore the brunt of the sell-off: more than £10bn was knocked from its market capitalisation, leaving it worth about £246bn. The falls were not gradual. Trading began with lenders under pressure as government bond yields surged, and the slide gathered pace in the afternoon after news of the Chancellor's meeting broke.

Healey has little room for manoeuvre as he prepares his first Budget. The public finances are under severe strain, and banks look like an inviting target. Lenders have posted robust profits in recent years, buoyed by higher for longer interest rates, and the political pressure to tap them is growing. The Trades Union Congress and the campaign group Positive Money have both argued that some form of windfall tax should be imposed on the industry to help households with the cost of living.

Why banks are in the frame

If Healey does decide to increase bank taxes, City analysts believe the most straightforward route would be to raise the bank surcharge, the extra corporation tax levy paid by the industry, which currently stands at 3 per cent. Figures published this month by HM Revenue and Customs showed receipts from the surcharge rose by a fifth to £1.2bn in the 2025-26 financial year. HMRC said this "can largely be explained by an increase in UK banking sector profitability".

More complicated options would include tweaking the balance sheet levy or imposing a new windfall tax. Neither would be simple. The surcharge and the levy were introduced in the years after the 2007-09 financial crisis, and the banks have lobbied hard against any further increase.

What the industry says

UK Finance, the industry lobby group, has warned Healey directly that higher levies would cut against his growth agenda and make Britain an even greater outlier internationally. Its calculations put the total tax rate this year on a model corporate and investment bank in London at 46.5 per cent, compared with 39.1 per cent in Frankfurt and 27.9 per cent in New York.

The banks argue they already pay more than other businesses because of the surcharge and the levy. One senior executive, speaking after the meeting request became public, said simply: "We are all intrigued." The Treasury declined to comment.

The wider market turmoil

The banking sell-off was part of a broader market rout. A worldwide bond sell-off pushed UK gilt yields to 6.07 per cent in morning trading, the highest level in nearly 30 years, heaping pressure on the Chancellor ahead of his Budget. Yields move in the opposite direction to bond prices: when yields rise, it costs the government more to borrow.

Axel Rudolph, chief technical analyst at IG, said: "Higher yields mean the Government has to pay more to finance its debt, putting further pressure on the public finances and making it harder to balance spending commitments with the need to keep borrowing under control." Neil Wilson, a UK investor strategist at Saxo, said the "relentless rout in the bond market is sending investors running for cover".

The FTSE 100 fell by around 2 per cent on Thursday. Interest rate-sensitive housebuilders were also hit, with Bellway down 5.3 per cent and Taylor Wimpey 5.5 per cent, as markets braced for borrowing costs to stay higher for longer.

What happens next

All eyes are now on Tuesday's meeting. The fact that it is the first time Healey has sat down in person with the bank chiefs since becoming Chancellor gives the gathering unusual weight. Investors will be watching for any hint of what the Budget on 28 October holds for the sector.

The politics are delicate. Healey needs revenue, and the banks are profitable and unpopular enough to be taxed without much public sympathy. But driving up the cost of doing business in the City risks jobs and investment, and could push activity to Frankfurt or New York, where tax rates are lower.

What is known and what is not

Known: the meeting is on Tuesday; the four bank chiefs invited are those of Barclays, HSBC, Lloyds and NatWest; the Budget is on 28 October; £18bn was wiped off bank shares on Thursday; gilt yields hit their highest since 1998.

Not known: whether Healey actually plans any tax rise on banks; what Tuesday's agenda will cover; how the banks will respond if the surcharge is raised; whether the bond market turmoil eases before the Budget.

Why it matters

This is more than a bad day for bank shares. It is the first real test of Healey's relationship with the City, and it sets the tone for the Budget in three weeks. If the Chancellor reaches for the banks' profits, it will signal a government willing to tax its way out of its fiscal bind. If he backs off, investors will take it as a sign that growth, not redistribution, is the priority. Tuesday's meeting will give the first clear indication of which way he is leaning.

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Sources

• The Times, "Bank shares lose £18bn after Healey summons bosses to meeting", 1 Oct 2026 — https://www.thetimes.com/business/companies-markets/article/bank-shares-hit-healey-meeting-bcp2pwh3t
• Sky News (via AJ Bell), "Late market roundup: Stocks fall as bond yields stay near record highs", 1 Oct 2026 — https://www.ajbell.co.uk/news/articles/late-market-roundup-stocks-fall-bond-yields-stay-near-record-highs
• Press Association (via Clacton and Frinton Gazette), "UK borrowing costs soar as gilt yields hit 6% for first time since 1998", 1 Oct 2026 — https://www.clactonandfrintongazette.co.uk/news/national/26596868.uk-borrowing-costs-soar-gilt-yields-hit-6-first-time-since-1998/