Postal votes...in St Davids

A student from St David’s turns up with a postal ballot paper…the accompanying letter has informed her that she can deposit the ballot paper at any polling station. The trouble is that the St David’s in question is in Pembrokeshire, and the relevant paperwork only arrived 2 days ago. I am sure that the instruction only refers to any polling station within the relevant district but send her in to talk to the staff looking after the polling station. They confirm my analysis…but inform her that she can vote in this ward as she is on the electoral register for St James. A future plan of campaigning must be to inform students of this right to vote in different districts.