thanks for these suggestions
yes we are in london, so i think renting her a room somewhere else would be prohibitively expensive. i know there are a lot of au pairs/nannies in the neighbourhood, so finding a flexible arrangement with another family could well be the way to go.
it's just this split day thing - that's really what we need but it's hard to see how that would work for someone having to come to us twice a day - bit of a drag for them i'd have thought!
cd - mansion, er... well we do have a lot of space on the gf and everyone always assumes because of that we have umpteen bedrooms - but we have "only" four, which are all being used at the moment - one for dh & i, two for the kids, one for dh's study.
there's potential to convert a currently unused bathroom or the loft to create a spare room - but after taking into account the cost, lead time and inconvenience of the building work, together with the fact that neither of us are that keen on having someone else living with us - i thought i'd think about whether a live out au pair would be a possibility. in terms of the help we need, it is the standard au pair duties (or at least what i think they are based on what people on MN say) down to a t.
thanks again, keep them coming