My local Asda had a great selection of Unwins Seeds (*veg, herbs, flowers) today, all marked down to 15p, originally £2.49.
It obviously may be store dependant, but worth looking out for if you're going anyway.
Some plantable now, outdoors, some indoors stuff like cress (maybe make some cress egg-heads with the kids on a summer rainy day) all were dated best before 2022 / 2023.
#Careful at the till, one of mine (3 X coriander) went through full-price (the self-serve attendant took over scanning due to probs on the machine so I hadn't noticed), a quick trip to customer services sorted it.
*eg. broccoli, cress, coriander, beetroot, spinach, radish, basil, parsley, pansy, nasturtium.