In the UK, the Financial Services Compensation Scheme (FSCS) provides insurance for bank deposits up to £85,000. Is there an insurance (or financial product) that provides coverage above this threshold?

There is a helpful answer to a similar question about personal savings: UK - What are the safest options to keep more than the FSCS limit in a bank/investment company?

Here I'm specifically interested in covering the risk from bank insolvency, for a business bank account.