Riverford delivers delicious veg boxes from its network of sister organic farms across England.  I have been a customer for some time and greatly admire their business ethics and the high quality of their produce.  I wrote about them in my book Eat Slow Britain - see here for an excerpt. 

Riverford Cooks is their initiative to get everyone cooking more vegetables.  As one of their network of Cooks, I give classes for customers and their friends, in homes, at my teaching kitchen and at Riverford HQ in Devon.  It's all about getting excited about seasonal vegetables and learning new ways to cook them.  Some of my Riverford classes are open to non-customers too (although we hope to persuade you of the joys of a veg box!) - so look out for dates.  And check out the Riverford Cooks website for more events and my Cook's profile.