Question to the HM Treasury:

To ask the Chancellor of the Exchequer, how her Department tracks the exposure of financial institutions to UK sovereign debt.

The ONS publishes estimates of holdings of government debt by sector. The latest available data, as at end 2025 Q3, can be found here - UK Economic Accounts - Office for National Statistics - via the July to September 2025 dataset.

HMT works closely with the Bank of England (“the Bank”), including through its membership of the Bank’s Financial Policy Committee (FPC), to monitor and manage risks to UK financial stability, including any risks that may occur from the exposure of financial institutions to UK sovereign debt.

As part of this the FPC conducts regular stress tests of the banking sector, which assess how banks’ capital and liquidity would withstand a severe macroeconomic shock, ensuring institutions are able to continue to provide core financial services through severe economic shocks which may impact the value of their UK sovereign debt holdings. You can read more about the Bank’s approach to stress testing and the results of the latest stress tests here.

We also work closely with the Prudential Regulation Authority (PRA), which supervises individual firms, to understand the risks arising from those individual firms exposure to UK sovereign debt and ensure that these are managed prudently within the regulatory framework. You can read more about the supervision of financial institutions here.

In 2024, the Bank conducted a world first System‑Wide Exploratory Scenario (SWES), to explore how a broad range of financial institutions (including banks, insurers, pension funds and other non‑bank financial intermediaries) would respond to a severe market shock. The 2024 SWES focused on the functioning and resilience of key markets such as the gilt and gilt repo markets. It sought to understand the behaviour of firms in stress, and how market dynamics can amplify a shock. The Bank’s final report found that actions following previous market shocks have improved gilt market resilience, with the broader financial system showing an improved ability to absorb large price swings in assets, including sovereign bonds, while also highlighting areas for further policy work. You can see the final report from the SWES here.

Taken together these actions – HMTs work with the FPC, regular bank stress tests, PRA supervision, insights from the SWES and ongoing monitoring – ensure that risks arising from financial institutions exposures to UK sovereign debt are well understood and effectively managed.