That's a start thanks SC. The fount of all knowledge in all things chilli.
Razzamatazz did well for me on a windowsill last year. Got about a foot tall in a 5 litre pot. This year I'm trying some other compact varieties, Super Tramp and Hot Juanita, both from Sea Spring Seeds.
Spike, also from Seaspring is another compact plant. Very productive of small ( 1”- 2” Long & thin) hot chillies.