Good time to start chillies is during February= now..

There is nothing unusual with their growing methods..just few basics 'rules'..they will need early start for you to able to get decent crop, they will need bit of help from gentle heat for germination, and you need to keep them potted on more often..so when you prick the seedlings, plant them into smallest pots you have and only pot into little bit larger when they've filled the smaller pot with roots.
They will benefit being in GH or tunner as rarely UK summer outdoors is warm enough for them for long term..odd days perharps but that is not enough.
As for varieties...UHHH..that is difficult one..just like with tomatoes, there is 'millions' of varieties around, different colours, heats, flavours and uses..
Perharps havin a look at the some of the chilliseed companies site would give you more idea..you can always make a list and see if anybody here has spare for those you have picked.
Here is couple of companys I've ordered from before..
http://www.chileseeds.co.uk/index.htm and
http://www.nickys-nursery.co.uk/catalog/advanced_search_result.php?anchor=top&SASSpage=http://www.nickys-nursery.co.uk/seeds/pages/index.htm&keywords=chilli&page=1&sort=2aAnd other one, although in Finland, but they have good growing info and sell seeds too..
http://fataliiseeds.net/