There does seem to be some confusion about this but as I said before I know it was certainly enshrined in legislation that birth parents had a right to know where their children were living. I suspect many sws aren't aware of this and get by on a wing and a prayer.
I suspect the lawyer for the birthparents in care proceedings would verbally slaughter the LA sw if the address of the foster carers had been with-held and that could effect the outcome of the case.
However as I said I have been retired from LA social work since 2004 so I don't know the current position.
I think it might be worth mentioning that when I started out as a social worker in the 1980s contact was always at the home of the foster carer, and so of course the bps knew the address. The only exception to this was in very rare cases where it was deemed too dangerous for bps to visit the home of the foster carer for contact and I can only remember 1 or 2 cases where this happened.
Foster carers struggled sometimes with this contact as you can imagine, but they knew this was the expectation before they were approved of course. Very occasionally a sw would visit with the bps but mostly that was not the case. Some carers were much better at coping with this than others. Many found that the young mum just wanted to chat to them and not bother too much with the child. Others brought bags of sweets and chocolate and handed them to the child and this caused problems, but the tactful carers said "best to save them till after lunch" or something. One frustration was bps not turning up and kids getting upset or bps turning up long after they were expected.
To be honest I cannot remember anything terrible happening in the LA for which I worked. Indeed a lot of carers said they felt the young mom needed fostering too. There certainly was no violence at all and despite all the worries about parents turning up on the doorstep demanding their child back, as far as I am aware this never happened.
We used to put on courses for foster carers on "Dealing with Contact" and it was useful for carers to swap tips for coping and whether they should stay in the same room or just occupy themselves around the house, which most of them did, rather than sitting in the same room with the bps. The best carers offered tea or coffee to the bps and I honestly think this contact helped the child far more than what happens today.
I don't recall how this supervised contact away from the foster home began. As I say it used to be used in the very few cases where it was felt to be necessary, but somehow it became the norm. I think it is so bad for babies and children to be driven many miles away for contact at a "contact centre" which is an artificial setting I think, and if the child is very young, contact can be daily. I also gather than some LAs are telling foster carers that they must do the transporting and not even paying mileage, which is awful.
Would be interested in any comments about the "old" way of contact in the home of the foster care.