I took the wheel to my local guy who has a press. He used a hone on the damaged bearing surface, the seals I ordered turned up and the wheel is now in!
The new tyre had to come off to fit the wheel in the press but things are sorted. Seals on shiny lands and hopefully the issues have gone.
Metzeler RoadTec 01 SE as per...
Phew.
Cost, about £65 of labour including fitting new tyre twice. 6 x seals < £12 from local Agricultural store (would have been £54 plus postage from Motorworks. I already had a set of FAG bearings).