Hi all, newbie here.

I would really appreciate some advice..

I started a hobby affiliate web site 2 months ago (i.e. I earn when visitors click on adverts on my site).  I'm currently earning around £120 profit per month and am also in full time employment. 

I've heard that I should register as a sole trader within 3 months of starting 'trading' so I need to decide now whether to become a sole trader or a Private Ltd company.  I'd like to expand my web site(s) and increase my profit.

Can anyone tell me what are the legal requirements for a sole trader? 

Once registered do I simply fill in a single tax return for me as a person every year?  Or are 2 tax returns required?

Do I have to do annual accounts etc or is a tax return all I have to worry about?

As a sole trader, do I need to obtain/issue invoices etc? or will bank statements do?

Can I bee a sole trader AND be in full time employment at the same time?

Although the limited liability would be good, I'm thinking becoming a Ltd company would wipe out all my profits in accountacy fees etc.

Thanks in advance for help you can give me.

James