Their website, www.riverford.co.uk is very easy to use.
You register, then either buy ready boxes of fruit or veg, or pick what you want (that's what I do, I am too picky). In addition to fruit and veg, Riverford sell fresh meat, olive oil, hams, delicious pastrami, alcoholic and non-alcoholic drinks, milk, yogurts, porridge, musli, eggs and much more!
Now, the produce. What can I say, I have been more than happy with everything I received. Always fresh, and carefully picked produce! Delicious fruit like apples and pears, berries, fresh and tender lettuce, ripe avocados to name a few!