I hear the Tim Spector books might be good – anything else to consider?
I think Spector’s stuff is decent enough. Mostly though it’s eat a variety of vegetables, fruit, cook from raw basic ingredients, with spices etc, wholemeal pasta and bread a good idea, try not to snack on biscuits, cake etc and stay away from the sort of ultra-processed salty, fatty, sugary food that seems to be the staple of the typical modern UK diet.
On the latter, the podcast series that the van Tulleken doctor twins on UPF is worth a listen and available on BBC Sounds, quite sobering but also entertaining. Even that’s not particularly complicated though, mostly if something contains ingredients that you wouldn’t have in your own kitchen / don’t recognise as food, you should probably avoid. Supermarket ingredient lists are terrifying, even the simplest things seem to contain all manner of weirdness that you’d never include if you were making the same thing at home.