Can anyone recommend a UK migraine specialist with an interest in diet/nutraceuticals?

I'm trying to find a UK doctor (NHS or private) who specialises in migraines and has a special interest in the role of diet/nutraceuticals.

I seem to have many dietary triggers but it seems that many migraine specialists dismiss this idea, and I want to avoid such people. Also, I want to avoid the drug route - give the poor quality of clinical trials in general and the lack of long-term follow-up, I don't trust the drugs.

I've already tried a keto diet (didn't help) and a nutritionist (didn't help). I want a doctor who won't be 'woo' but equally won't be fixated on drugs and has positive expertise in diet/metabolism/nutraceuticals.

This new approach (metabolic/nutraceutical) is what I'm aiming for, but those folks are in Switzerland, even if they're clinicians.

Does anybody know of any such doctors in the UK? Or have ideas about how I might find one?

Thanks!