Looking for pranayama training (uk based but happy to travel)

I'm looking for a really good deep dive into pranayama. I've been practicing yoga for about 10 years and have a regular pranayama practice and want to deepen my knowledge and understanding in this area. I'm based in the uk, something local would be great but I'm also happy to travel for am intensive course that meets my needs. Can anyone recommend a good course?
Many thanks!

I get a lot of Pranayama in my Kundalini class, maybe check it out in your area.

Sivananda style Yoga does much Pranayama. do you have the book "The Complete Illustrated Book of Yoga".

https://www.amazon.com/Complete-Illustrated-Book-Yoga/dp/0517884313