Without going in to too much detail I've been approached to do some consulting work in addition to my day job. I've had it approved by my main employer and they're happy there's no conflict of interest so we're good to go on that front. It's quite interesting work so I'm not really doing it for the money but equally I want to make it worthwhile and want to ensure I don't fall foul of tax rules etc.
I'm already paying higher rate tax on my day job earnings through PAYE. I've quoted an hourly rate to the new company that ensures it's still worthwhile assuming I lose half of it to tax and NI but I have very little clue as to the workings of it all - I've never had to complete a self assesment for example, its always been done through PAYE. How complicated is it and do I need to employ an accountant?
To add to my confusion a few friends have suggested I set up as a limited company
What would the benefit of this be?
Currently I'm not even sure how much work there will be - it could be anything from one to ten hours a week and could last a month or years, I simply don't know at this stage.
Since we have people from a vast swathe of backgrounds in one place I figured this would be as good a place as any to start - so what should I do?
We must have plenty of self employed people and small business owners on here 
Thanks in advance!
I'm already paying higher rate tax on my day job earnings through PAYE. I've quoted an hourly rate to the new company that ensures it's still worthwhile assuming I lose half of it to tax and NI but I have very little clue as to the workings of it all - I've never had to complete a self assesment for example, its always been done through PAYE. How complicated is it and do I need to employ an accountant?
To add to my confusion a few friends have suggested I set up as a limited company

Currently I'm not even sure how much work there will be - it could be anything from one to ten hours a week and could last a month or years, I simply don't know at this stage.
Since we have people from a vast swathe of backgrounds in one place I figured this would be as good a place as any to start - so what should I do?


Thanks in advance!