I too make DFK a requirement. Some girls say they offer it, and indeed do engage but many have a trick of using their tongues to block yours from going into their mouths, which I find irritating.
However some don't. Nicole, in Golders Green is a good kisser:
External Link/Members Only, and so is Laura in Tufnell Park:
External Link/Members Only, but both of these lovely ladies are in the £110+ bracket.
One lady called Bella, in Tottenham Hale does DFK
External Link/Members Only, but she too started with the blocking trick with me until I managed to 'break down her defences'
. She's on holiday at the moment, but worth waiting for, especially as she is in your price bracket.