It's a RAF flying club so is a non profit outfit hence the prices. My yearly membership is £160 as I'm a civvy member. Civvy membership is open to
RAF-employed civilians, former members of the RAF, dependants, others at the discretion of the OIC. It helps if you have a tallent they need 
Have a look here: http://www.raf.mod.uk/rafflyingclubs/
Re the Tacho time, this is the hours meter on the tacho which only seems to start counting after the engine has reached so many revs. So it does not time correctly taxi time, etc
Now this is diferent from a Hobbs which starts timing once the master is on.
Vince