I went into my local sub-postoffice this morning to buy some 20p stamps.
I post stamp sales abroad and buyers like the bonus of some commemorative stamps on their envelope. So, 1st class + 2nd class + 20p stamps.
But the post office said they no longer sell small denomination stamps, only 2nd and 1st class stamps.
That, together with the big notice saying they no longer sell lottery tickets gives the impression that post offices are no longer worth visiting.