A lot of neglect is SW speak for either DV, drugs, alcohol, or MH issues. Removing children from the birth family is a last resort, never a first option. Children are placed for adoption if there is no chance, due to the above issues, they will be able to return home. It is cheaper to move young children to adoption (new parents pay to bring them up) than 18 years + care leavers package covered by the LA to keep them in foster care.
To answer the question of the person who asked about tracing family, the children never know their original surname unless the adopted parents choose to tell them; sometimes, but more rarely, first names are changed as well. They are never matched with potential adopters in their local area, either. They also get a new birth certificate.
There are post-adoption support groups via the local council or external adoption agency for parents to join either in person or virtually for support, but most choose not to engage.
I attended an outwards bounds weekend with my teenage kids and family and 15 (ish) other families. By the end of the weekend, one of my children felt he had made some lovely friends and decided to tell them he was fostered (no idea why). When he recounted the tale to me, the look of shock still on his face when instead of being asked 20 questions or kids not understanding, one of the other children said 'Me too', and they slowly realised the entire event was for fostered children through the same LA.
Fostered/adopted children do not look different @Gonnagetgoingreturnsagain. He has a totally different skin colour and heritage than I do, but there is no reason why I could not have been the birth mother with a different father. Pls don't be judgy; families come in many different guises and mixed cultures.