I've seen Lady J a few times for her blow and go, can't say I've ever not come away with a smile on my face. Might be worth chatting with her about what you want, never had a problem with deep throat and a little skull fucking last time I saw her which was a few days before Christmas. I will say her availability can be a bit hit and miss.
I've asked her about full service before and she said that's she's been having some health issues, don't worry nothing contagious, and is waiting for her doctor to give her the all clear which she's hoping would be early to mid Jan.