The best, full-on balls deep, nose on your stomach, feel their throat contract around your shaft type DT I've had in the SW recently was
External Link/Members Only, a regular tourer.
IIRC she didn't permit CIM but keep an eye on the profile as she's a regular tourer and will probs be back sometime and the DT alone is worth it IMO.
Could also try
External Link/Members Only (close to Bristol) but no CIM there either. She would, and does, take it like a champ though as she is a 10/10 whore and gives an unbelievably throaty and spitty BJ. Lips are incredible.
I visited
External Link/Members Only a few years back - probably around 2019/2020 when I first started punting - for a couple of oral only 15 min appts and if you can make it as far south as Bridgwater (she does occasionally visit Bristol AFAIK) then I think Debbie would be a pretty sure thing for the deep throat fuck and cum-in-throat that you're after. BB is offered by that SP though so beware. I only mention her as I know from first-hand exp that she is a complete whore and basically lets you do whatever you want to her.
It's a shame that we lost Bella from Wellington some years ago as I did exactly what you describe in your post with her several times and it is a very fond memory.