Grow your own
Grow your own – even if this is a tub of cut and come again lettuce or herbs you use regularly on your windowsill. Think of the space, water (if you collect rainwater), fertiliser, transportation and packaging this saves.
This is a great website to buy vegetable seeds grown without the use of peat. They also send a monthly email to tell you what you should be doing in the garden. https://vitalseeds.co.uk/
For perennial vegetables that will grow back every year, visit: www.incrediblevegetables.co.uk
To learn about permaculture, visit: www.permaculture.org.uk or www.brightonpermaculture.org.uk