[tomgallard]

This is great advice. You should understand what's going on, what your company needs to file and to who. However, get your accountant to do it for you, things such as Corporation Tax / VAT returns are complicated, and you will get no sympathy from HMRC if you screw up.

Your accountant will also be able to advise you on company structure, and most importantly some of the significant tax savings you can make when incorporating:

http://www.rossmartin.co.uk/index.php/incorporation/607-good...

You can basically sell any assets (including 'goodwill' which is the valuation of the business over and above its assets) from the sole trader to the Ltd Co.

This is a great way of removing money from the company at 10% (CGT Entrepreneur's rate) rather than your income tax rate)