I'd be super grateful if you could share numbers for frontend/fullstack roles!
Typical entry level roles start at around £32k.
Senior individual contributor roles (so not factoring in team lead roles) go to as high as £90k but around £70k is more typical of the average senior frontend developer.
For context, I've been running talent functions for tech startups in London for about ten years as well as running a number of tech job boards over the years.