Yes, and I think that there was research that showed there are still observable differences between those children, now adults and almost adults, who were in walking distance to these centres and those in similarly deprived neighborhoods without easy access to them. I'll see if I can dig it out.
Children living near Sure Start centres did better at GCSEs, study suggests - BBC News https://share.google/nyGPHrYbuJ32oRsmZ
Three grades better sounds arbitrary but I suppose it's all the unmeasurable things about wellbeing and support that afforded that and which will continue long beyond GCSEs. Personally, I think its success was in its ability to somewhat fill the gap left by atomised families and deconstructed communities. I think it did a lot of heavy lifting.