For years it was a church that I would normally pass on my way to going elsewhere, so quite convenient. A few elections ago it was changed to a church slightly further away and not somewhere I had any reason to go to, so less convenient. Not sure about the reason for the change -- the first church is still a polling station, and on the first occasion I went there, because I hadn't noticed what the polling card was telling me to go somewhere else. As I didn't have the card with me, I didn't know where I was supposed to go, but the people staffing the station were very nice about finding out for me.