There's a commenter who I used to read below articles at Morgoth's Review which is a British Nationalist site who would list the excruciatingly high numbers of Jews on the BBC. It's extraordinary. The Chairman is also called Cohen so I won't bother naming his ethniciity.

As for AIPAC like things in England the two major figures are the Labour and Tory Friends Of Israel. They don't hold large and glitzy rallies like AIPAC but they're extremely powerful in terms of lobbying.

There's actually been a few good mainstream documentaries about them like this one.

It's nearly a decade old but I'd guess it's as relevant today as it was when it was made.