I looking into a setting up an online store selling mainly DVD's and Games etc. I'm going to be running this at home, I'm living in the UK, and it's just me. What forms do I need to fill in to make my business legal, I think I'll be a sole trader after doing research but I'm still not 100% on what I have to do. Could anyone tell me what ones I need to fill in and how much it's going to cost for registering myself as a business. I have got a qualification in E-Commerce about a year ago so I know most of the legislation, just need info on the setting up as we didn't cover it.

Many Thanks for all answers