Are you planning to get 'married proper' or hand fasted?
To get marries proper the venue must be a public place (so that anyone can attend and protest when asked if they wish) - by law anyone can attend a wedding.
Although the rules were greatly relaxed you can still not get married (proper) just anywhere. First of all you need a registrar that is willing to do it. Your first port of call should be the registry office in the area to check if it's possible.
If you're after a hand fasting then buy the local druid a beer and you're sorted :-)