You asked:

is there a post office in pleasant valley, pembrokeshire

No. Pleasant Valley, Wales, UK does not have a post office.
post office
post office

post office (a facility offering postal and related services)

tk10publ tk10canl

Say hello to Evi

Evi is our best selling mobile app that can answer questions about books, music, films, conversions, history, people, places and much more.

To experience the full power of Evi you can download her app for free on iOS, Android and Kindle Fire.