Thanks for the replies so far guys.
Us ATCOs do know that you are legally bound to follow an RA (which are only given in the vertical plane), and we have our bits in the book about what to do (ie pass traffic and a request to advise when you are under our control again), but it was the turn thingy that caught my interest. GWH's input about the 15 degrees of bank is interesting to know (and thanks mate! I've seen the "double-bump" BIG video a couple of times). And Waldo has highlightes something I'm sure quite a few of us weren't aware of (and I'll contact our TRUCE people to make sure they know!)
Any other thoughts?