Hello Ian, and welcome to the BAA
We have a number of active double star observers in the Deep Sky Section, as Jeremy mentioned John McCue is the sections’s double star advisor.
If you send me a direct message I will add you to the deep sky section members list. There should be a section newsletter coming out soon which has some double star reports and a short article.
The section also has a meeting on April 22 in Bedford, if this is at all convenient for you to attend, you would be most welcome.