I'm a bit surprised anybody thinks Post Offices are fit for the dustbin. I have one 5 mins away, and I'm pleased it's there, given that local bank branches are being stripped out and the market leaves us without buses evening and weekends despite being well inside the boundaries of a large city.
Apart from the obvious postal stuff, the community hub , cash services etc, Post Offices provide government application services. 3 million plus people use them to access benefits, state pensions and tax credits. Council services, such as rent, council tax and meals on wheels are administered through Post Offices. More than 40% of users are from social classes A,B,C so no need to be too squeamish about slumming it. The quality of service from staff at ours is second to none.