Who can assess a collision damaged bike in South London

I got hit by a car over a year ago.
Took the bike into a local shop and to my surprise, they appraised it as a write-off.

Unfortunately, the insurance company disagrees (9 months later), after I dismantled the bike to store it. So I need a shop, or frame builder in South London who can do me a new insurance assessment.

To me it needs new bars, stem, headset, bar tape, cables, front and rear rims, wheelbuilds to suit, new mudguards and then the frame needs to be checked for alignment and resprayed. At worst it might also need a new fork.

It's a handbuilt steel frame that I made on the Dave Yates frame building course, so I do want to get it fixed.

Any ideas?

https://www.thecyclerylewisham.com offer it as a service.

No personal experience though, I'm afraid

Why are the insurance disagreeing? Most frames I have to do insurance quotes for I'll happily write off because getting hit by a car isn't part of their usual design use or what it's designed for. If it's not obvious that it's fine the manufacturer isn't going to guarantee it's safe so it should be replaced. I guess ask any other shop to sign off on it for another fee and add it to what you're claiming, using it after that is at your own risk but you can't really say that every weld or tube is fine unless you're pretty happy that, say, the rear wheel took all of the impactn or whatever depending on the accident.

Brixton cycles did am assessment for me after a similar crash and written off bike. That was a pretty long time ago, but sure they'd be happy to help as it's a great shop

I had success with a stubborn insurer by reminding them that if a component failed after being cleared to ride by them (or their chosen assessor in my case) their liability for my potential injuries and loss of earnings would far exceed the cost of replacing the component. They stopped arguing after that.

Nigel at Sidcup Cycles did an assessment for me which resulted in a full pay-out by the insurance company. Alternatively I have had good mechanical work done by the guys at Panagua (though not an insurance claim I'd back them to do a good assessment)

Given the amount of damaged you've detailed above it will be more economic for an insurer to write the bike off and you should push for that. Once that's been agreed the old bike becomes the property of the insurance company, that's just a pain in the arse to them and they will happily agree a nominal value for you to buy the bike back and you can fix it up as needed.

May be see vaz for frame assessment considering it is a steel frame.

I think the problem has been the sloppy initial assessment and that the insurer requested photos of the bike as proof of the damage.

I did photograph everything, but buckled wheels don't show up in photos and scraped paintwork and scuffed handlebar tape don't really look that bad until you consider the consequences of catastrophic failure..

The original so is not being helpful and haven't offered to rewrite the assessment either.

Thanks for the suggestions, I'll have a ring around and see who can help.