As a local living near Covid City there is/was one in Leicester itself
ProjectX CQB -
https://www.facebook.com/projectxairsoftsite/ unsure on prices now since they took over the site from the guys at Department CQB - only 40 spots a game now tho used to be 100+
“massive ex hosiery factory in the city over numerous areas - great fun”
In Leicestershire there are a few
The department CQB in Croft -
https://thedepartmentcqb.co.uk £20 for a 3hr Session weeknights/morning or afternoon on Saturday- £23 for a Sunday
“indoor CQB site not the largest CQB in the country, well run, great fun for a fast paced pew pew for 3 hours” but haven’t been since C-19 so can’t say how the numbers work.
Skirmish in Lutterworth -
https://www.skirmishcombatgames.co.uk £25 (in advance) otherwise £30 a session.
”nice woodland site, enjoyable and games usually very varied”
The Goal in Oakham -
https://thegaolevents.co.uk £35 weekend game
“Airsoft in a old nick (YOC) - what can’t be more fun than that ? Nice mix of out and inside action - great if it’s absolutely chucking it down”
MAW in Melton -
https://www.midlandsairsoftwargames.co.uk - unsure on prices never been
“never been but I know the area at the bottom of Asfordby Hill - so expect some elevation changes”
hope this helps
enjoy!