Retired Dutch national living in the UK / TAX ??

Hi there, I am a retired Dutch national living in the UK. Moved to the UK July Protected content . I receive my Dutch pension on a Dutch bank account and everything looks ok. Pay annually my tax in The Netherlands and am insured for medical costs in The Netherlands. All as if I would be living back "home".

But .......... now my bank wants to know "mijn fiscaal inwonerschap". I have always thought that the answer would be The Netherlands but is that so?

Would be nice to now more about this and maybe I am not the only Dutchman in the UK with this potential problem.

Many thanks.

Huub Dierx