I am no fan of Blair, but his govt did produce some very good drives in their first term towards better services and provisions, actually better, with actual values underpinning them, and actually attempting to move services towards catching those who fall through the net. The introduction of a strong ethos of joint working and communication between services (linked to the Climbe inquiry) was one of them. It was sound practice.
It's now vanished, in part from services being cut to the bone and badly funded, (no capacity to talk to other services, no time to communicate); and increasingly service provider front line thick skins and distance from service users. Because otherwise workers would lose heart and give up, what with all the funding based evasion and gatekeeping they have to do that involves rejecting people in need, and all the hard work and money now spent on meetings etc trying to avoid having to take on someone that more work and responsibility has to be provided for, unless they really is no escaping them. And most of all, it failed through lack of accountability and consequences for not doing it.
We've had many papers since this time asking why child safeguarding practice (which includes joint working, sharing information) has been something professionals are trained in, but is not actually used, and why the repeated failure of joint working, among other areas, underpins so many serious case reviews. It's known and understood why. But no action results from all that understanding.