Update - SORTED!!!
Fitted repaired radiator at the weekend with a nice new set of Samco hoses, it is now as straight as it is going to get and fitted straight on, no messing. Hoses were a bit of a faff but not the worst thing I have ever done. Just take your time, a hose at a time and its easy enough.
Flushed it all with water first, drained and then refilled with coolant (NOT forgetting the pesky bleed bolt in the head), ran it up to temp (with TuneECU plugged in so i could monitor temp etc), let it cool down and then topped it up a little, cap on, filled header to max, JOB DONE!
This was looking like a new radiator when I started but cost me £45 for the radiator fix and £100 for the hoses and clips.
I am a happy chappy, the CAT N Write Off that I bought is now fixed and ready for the road and has cost me a total of £750 in parts and repairs and about 3 weekends in the garage straightening and refitting bent bits, plus the bike at £6800. So for £7550, I got a 2013 Roadster with 963 miles on the clock. I am not grumbling at that! Just needs MOT and TAX, already insured (mention that in case of forum police coming along

). I think thats a pretty good deal
Just waiting for my Hogweed radiator cover to come now and it's finished.