Have been buying my seeds from ‘Real Seeds’ this last two years and had no germination problems. Even last year’s packets have come up trumps. They also encourage you to save your own. Small company, very ethical.
They don’t do F1 hybrids though, if you want a special crop. They do lots of older varieties and they test all the seeds themselves for germination, growth and flavour.
They are sold in clear plastic pkts, with sowing instructions enclosed. The post is very quick.
They have to charge you 1p initially to become a member of their club, because, apparently, outside the main protagonists, no one is allowed to sell seed without a licence. Ah, this modern, capitalist world🙄