Here are a couple more FM stations from the London area from the early 80s. Uptown Radio used to broadcast every Sunday evening. I used to enjoy their entertaining shows and their signal used to come in well at my QTH just outside London. There is more about Uptown on the Surrey Sounds website. The other clip is from a station called London FM.
Uptown 1 (1:08 mins)
Uptown 2 (0:32 mins)
London FM (0:31 mins)
Much more information about Uptown Radio and London FM and several longer recordings on the Radio Eric site http://radio.eric.tripod.com/uptown_radio.htm and http://radio.eric.tripod.com/london_fm.htm