Are you getting money back on the insurance, or are you just buying another bike?
If I had £1000 to spend, I’d look at a Retrobike. And to those who scoff at the idea of a bike that’s, heaven forbid, MORE than 10 years old, I’ve seen Kona Hei Heis, Litespeeds and Airbornes all sell for under £1000, complete with half decent forks and full XTR to boot. Not to mention the fact that you can also get Fat Chance Yo Eddys, pre-trek Kleins, Yetis and similar bikes for the same sort of cash as a Halfords Boardman (not that there’s anything wrong with a Boardman).
A £1000 retrobike of that sort of quality will kick the a**e out of any modern bike for the same money and will probably last longer, too.
Be a little bit different and go retro! A ’97-’98 hardtail will happily take a set of 80mm forks and some have disc mounts too.
If you want something a little more general purpose, then take a look at a GT Zaskar from around 1996 onwards. Bombproof, light as hell and will take an 80mm fork. Frames can be had for around £150-£250 depending on condition, and you can do a full XTR M950 build with a set of modern 80mm forks for under a grand easily.
You’ll always look cooler if you rock up on a top spec Retrobike too, instead of a £1000 Generalized or similar. Too many people get caught up in the idea that modern is always better, when it’s not always the case.
Just my 2p worth.