Yvonne wrote:

Could anyone advise me where I can get tubers (or whatever) for the dutch
variety of potatos, maybe Knipfler or something like that - longish, yellow
in colour, waxy and very very tasty - in Melbourne.

Diggers Club - in Melbourne. On web?

for other seeds, look for seed suppliers in the two organic/green
magazines at newsagents,

Also, does soil type matter when growing these? We have very alkaline soil
in my area (but lots of compost too).

Split your first bag of tubers into different soil types/mixtures and
see.

Ours didn't do as well this year and we think it was the heat.