Thanks for all the replies!
WSO not an option - same test that prevented my pilot application going forward also meant I couldn't go into this branch. With regards from going across branches as an officer (say ATC->WSO) is that common in the current RAF? I'm fully intending on making a career out of my choice, but its unclear if a branch change is possible as an officer or just through a commission
I think I'm going to go down the systems route for now, and possibly reconsider if offered a role in the control trade as I have the aptitude scores. I've heard that control rarely escape the tower due to manpower requirement, but if a current or recent ATC appears I'd like to know their opinion on this!
Thanks again all