There is not anything to my knowledge. I have thought about writing something but never got very far with starting that.
If you search my username you will find some posts from the past about the costs of employing a nanny. The figures will be a bit different now but the same principles apply.
Generally speaking these are:
You are the employer of the nanny, you set the hours of work, the days, you set the pay rate, you can tell them what to do and when to do it - though try not to micro manage.
You therefore need to run PAYE as an individual employer, the nanny does not work for your business. You need to provide a workplace pension scheme.
You provide a contract of employment, with at least statutory paid holiday entitlement. You can decide how holiday is allocated - one way is to say all bank holidays are to be taken off as annual leave, then split the remaining amount 50/50 between your choice and nanny's choice. You can decide all of it but this does not generally go down well with nannies.
You can outsource this to a nanny payroll provider, such as NannyPaye, PayeForNannies, TaxNanny etc.