For the HSBC Expat account in Jersey the minimum balance is £50,000, not 25,000: see https://www.expat.hsbc.com/accounts/products/bank-account/ , under “Eligibility”:
To become a customer you’ll need to be at least 18 years old, and hold a minimum of GBP 50,000 (or currency equivalent) in deposits or investments with us, or have a sole salary of GBP 100,000 (or currency equivalent), or have qualified for Premier in another country.