@peeteepee@gardening They’ve already been mentioned but Real Seeds are excellent. I’ve bought a lot through them over the years. Sow seeds have been really good for green manures.
I’ve found Chiltern seeds, DT Browns, Mr Fothergills, Premier and King’s have all been good to buy from. What I can never remember is which company provided seed that didn’t do so well.
Last autumn I bought a lot of seed from Homebase online as they had a clearance sale £1 per pack of seed from different companies, sutton, mr fothergills, sarah raven, RHS. Price wise it’s worth keeping an eye out for these kinds of deals now we’re into autumn.
I’m venturing more into seed saving and landrace gardening so I will be buying heritage/heirloom varieties more here on in.