I don't know how I found it but Nannytax is a sort of interesting resource that covers the nanny tax regime.
My only real caveat is the cost. £250 per annum sounds a bit steep to me - unless of course your clients are at the top end of the income scale when I suppose it's peanuts. They also make the claim that:
"Just using an accountant is on average three times more expensive than using Nannytax. Add to that the cost of using a lawyer if the employment relationship turns sour and you could be looking at ten or more times the cost of an annual Nannytax subscription. That’s why even accountants and lawyers use Nannytax!"
Is that true? Seems a bit far fetched to me.
Oh yes - and I'd like to have a conversation with them about selecting nannies. But I couldn't see a mechanism for doing that. They get an email as well! But one thing they have some great stuff about 'nanny sharing' and the tax implications.