We're big fans of Gousto and I've not shared a promo in a while but they just upped their offer to new users getting 70% off their first box then 25% off for two months
www.gousto.co.uk/raf/?promo_code=SARAH43962783
Gousto has essentially taught my two teenagers to cook. There is loads of selection, clean up is a whiz, and it's super easy to skip a week or cancel your subscription. It can all be done via the app.