That is 71% more than at the end of 2008, when there were 488 unresolved careproceedings cases, the charity said.
BBC: Court delays 'damaging' children in care
2.
He said the careproceedings system was "not geared to being timely and quick in the way it deals with things".
BBC: Court delays 'damaging' children in care
3.
Ofsted also said adoptions were being hindered by social workers not intervening early enough and "cases being allowed to drift" before careproceedings.