Having looked again at frame the thread isn’t completely stripped, when you run your finger over you can feel the thread. Once tap arrives I’ll try to run that through to see if that cleans the tread out. Already ordered new pivot bolts as that was fubar! So still not quite sure if the thread in frame is shot or it’s just full of crap from bolt.
At least I know a swing arm is available if it is completely knackered!!

Update:
Tap arrived today, ran it through swing arm and all good! 🙂
Looks like the pivot bolt has stripped and left itself in swing arm. Tap cleaned thread out, tried good pivot bolt and went straight in and torqued off no problem.
New pivot bolt set ordered from jungle today!
Dropped stiff cycles and Santa Cruz a thank you email to for their help.

Phewww………

Good stuff, result.