my gut wouold tell me not to put my dd into foster care - i have no reason. i too have followed your threads.
at this point i would see whether i could get a solicior, lobby local councillors to apply pressure on my behalf, and threaten contact with local newspapers.
i think in this case ss seem to be extremely remiss in their responsabilities towards the safety of your daughter.
myh gut instinct is that although shes being a shit with you at the mo, her experiences at the friends house will prolly be a lot better than her experiences in care.
i think anything legal and documentary that forces this man to have legal responsability for the welbeing of you daughter will shit him up - this is what i would fight tooth and nail for at this moment in time if i were you.
make big waves. the police are not acting on a situation where a man who presumaly has no crb check - is certainly no relation is harbouring your daughter at his house without your permission. i would phone the police explain the situation again and tell them that "we can't do anything" is not a satisfactory answer , you want to speak tos omeone senior NOW. again threaten papers. ask for a copy of their compaints policy and get a solicitors advice opn what many laws must be being broken with this situation.
then i would do the same with social services. senior person, papers threat, copy of complaints policy. soliciotrs letter lobby councillor.
if this man is to have your daughter under his roof you want the proper measures in place the proper precautionary measures to ensure your daughter safety. do not take no for an answer,
go to local and national press if need be - i am sure in this hysterical light of paesophilia that someone is going to ask "wtf, this is insane"