It woudl be great if these services were in place tbh. Then it could be not only used to transfer from birth centre or home to hospital intrapartum where caregivers are in attendance (homebirth etc) but also could be used for instance in our area where women do not have transport to the hospital: we tell our women ALWAYS to get a taxi or a lift unless instructed otherwise by the hospital (emergency or bleeding) but if it is Friday night and it's 12 midnight, chucking it down and it's a three hour wait for a cab then it's not unreasonable to call an ambulance to get to hospital to have your baby, because if you need to get there and there is no other way, needs must. I used to do home assessments in labour and hated calling 999 for this purpose but sometimes you just had to, no choice. This sort of service would also be great for things like transfers between units for pregnant women, eg if you were an antenatal patient needing transfer to a unit with a NICU cot. These sorts of transfers tie up normal ambulances too and sometimes they go hundreds of miles.