I have lived in Thailand for 16 years. Of course I need a UK bank account so I can control when I choose to remit money to Thailand. Government investments and private dividends are better paid into a UK account.
I have accounts with 4 different UK banks + WISE. I also have credit cards with available credit of £80k - that is a useful back up.
If you have any income, or particularly assets, in the UK then it is sensible to retain at least one bank account. Preferably with a UK address.