This is my first year, but based on my research and experience this is what I'd recommend.
I found the Thorne Bees on a Budget hives (
Bees on a Budget Hives) to be best value. Just the hive, not the kit with bee suit, tools etc. Cheaper even than individual seconds parts in the Maisemore sale, especially once you've factored in frames and foundation.
3 Bees on a Budget hives gives you kit for 2 colonies, each with 3 supers, and a spare floor, brood box, QE, dummy board, crown board and roof.
On the bee suit front I've bought a Simon the Beekeeper Buzz Lightweight suit for my wife and a Professional suit for myself -
Buzz Professional
I'd definitely recommend spending the extra on the professional suit - the fabric quality is much better and it comes with a spare veil. At £50 it's still well priced.
Smoker, hive tool, mouseguards, feeders.
Assuming 3x 14x12 BoaB hives, 1x STBK Pro suit, 1 stainless smoker, 1 STBK hive tool, 2 mouseguards, 2 STBK Economy rapid feeders you're looking at ~£675-£700. Standard national hives would bring this down a bit.
Plus bees.
Plus extraction equipment, though this may be hire-able from your local association, or you may not get a crop, or just crush+strain.