Yeah, it's level four, and home games are usually at Fairford Town.
WSL
Championship
National League North/South
National League Division One x 4 (North/Midlands/South East/South West)
Haven't been to a game myself yet, but am considering going to the Maidenhead away game on Sunday as it's closer to me... though I've just found out they're probably playing at Chalfont St Peter.
There is a home match against Cheltenham this Thursday night, but worth checking before as the game dates and venues seem to change at short notice.
I keep track of fixtures and results on the site (including almost all the historical results) but can't promise my info is always the latest, FA site is the best place to check fixtures etc:
https://fulltime-league.thefa.com/Index.do?divisionseason=517827140&league=872938