I'm not convinced it would have made a particularly survivable recce platform - in cold war Europe anyhow - compared with the SR-71 it hadn't got the speed, hadn't got the altitude, and certainly wasn't stealthy.
I didn't think Cold War Europe existed in 2003 when BA retired it's Concordes, which is what I was refering to with my 'what if' scenario of them being turned over to RAF use with impending
PR.9 retirment.....