It is £60 a year at Swansea, or that is what someone else has been quoted from the club.
I have it on very good authority that the application forms are readily available from Cardiff Academy of Aviation. However they require the payment of £300 for the first years membership up front before they release the form.
At the moment the access for private owners is "in business hours only" and there are no concrete plans for or against twenty four hour access.
I'm off to Aero's or Swansea. I'm leaning more towards Aero's (probably a better idea for me as I'm going commercial).