Thanks Vinlander. I'll check this out as they have now opened a Morrisons near my work.
I've found some chilli seed...older but the varieties you mention. I'm doing a germination test, if it's ok do you want some?
Bear in mind that a) it was the biggest Morrisons in my area and b) I can't guarantee the fruit will always have seeds in - but I've asked a friend to look out for some very ripe ones in the Canaries (they are a minor commercial crop in Spain) - I pay for the fruits and he sends the seeds here (the process should cost me less than a euro). If yours is seedless I may be in a position to fill the shortfall soon.
My chilli seed collection dates from 2008 and I have seeds from every year since. I found last year that 2008 seeds had stopped germinating at all, so I've dumped 2008+9, and avoid 2010 + 11 if I have any newer alternative. There are a lot of dud summers and correspondingly flat seeds in my collection - I try to avoid those too.
I grow less varieties every year - the only hot ones I grow now are C.pubescens for their perennial convenience - leaving more space in heat & light for the delicious seasoning chillies that you simply can't buy - even in London
(I've met about 10 people who know about them, and they all say their mothers get them sent from family & friends in the West Indies).
Unfortunately the seasoning chillies tend to be just as late as their hot cousins so I have to buy in seed occasionally -
www.semillas.de has a good range of them but they are like needles in a haystack of hot ones
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I can recommend Tobago Seasoning - probably the earliest - with just enough heat for a really good pepper sauce. Other ones with less heat are Numex Suave and Trinidad Perfume. This year I am trying Pera Dulce, Aji Sweet, Vicentes annuum and Santa Lucia Yellow.
I also grow the various 'chiquita' orange peppers - seeds taken from fruits bought in supermarkets (both the medium length ones and the "mini sweets") - for me the best and strongest flavour of any sweet peppers. The other colours aren't as tasty.
Cheers.