Anyone of a supplier that has a large number of varieties of :-

Runner beans
Peas - garden and mange tout
French dwarf beans
Hot chilli peppers

This year I'll be (electric) propagating hot chilli plants. I'll be swapping
them with tomato and cucumber plants grown by other allotmenteers.

I notice the big-name seed merchants charge a lot for postage on the larger
seed varieties.

Any names appreciated - the more the merrier. TIA.