This prompted me to reflect on all the banks which have closed in the area in the last 40 years. Here's a few - I am sure others will add some:
Midland, Craig y Don
Midland, Penrhyn Bay
Midland, Deganwy
Natwest, Deganwy
Natwest, Penrhyn Bay
Natwest, Craig y Don
Natwest, Glan Conwy
Barclays, Conwy
Barclays, Llandudno (moved into the Martins bank)
Natwest (ex Westminster), Llandudno
Natwest (ex District), Llandudno
Natwest (ex Westminster) Colwyn Bay
Natwest, Llandudno Junction
Midland, Mochdre
I suppose there has been a corresponding opening of what were Building Societies which to some extent has off-set the closures but only in the main centres.