another couple of points when employing and employing part time
if you are taking on employees you will need a employment contract and they must be given to them within 3 months of starting work.
You will need employers insurance, you can get this either as a seperate policy or a joint PPL and Employees policy
If you are taking them on part time, try and give them 24 hours a week, this way they will be elligible for full working tax and child tax credits
Do not worry about sick pay, maternity/paternity pay, although you have to make the payment to your employee the inland revenue pay it back to you
you can do the pay slips yourself and use the inland revenue website to work out the pay but I let my accountant do this
You will also have to pay NI for the employee, this will depend on their wage and its paid to the revenue every 3 months, they will send you a bill, just pay it via internet banking
and finally you need to take more notice of H & S, being a sole trader and falling from height and hurting yourself, well the HSE won't look at you, but if your employee has an accident and its serious then they will become involved.
apart from that its a breeze, good luck