I have DC with SN aged between upper primary and college. With the primary aged children we talk at the school gates with other parents of dc who have SN and we share with each other the battle to get a diagnosis, ehcp, any kind of support. Then as the children get older I don't chat to the parents as much but I hear about the children whose parents were begging for support aged 5 now going off the rails. Yesterday my 12 year old told me that one of the boys in his year who went to his primary school has now been arrested for raping a girl. He's 12. I remember his mum desperately trying to get him an ehcp when he was 5. I know this is a generalisation but he's one of those children who needs vast amounts of attention and exercise because if they get bored they get into trouble.
My dc secondary school is really good with their learning support department. They regularly take children out to do farming, gardening, surfing etc. But there isn't the funding to take everyone who needs it and realistically, apart from the occasional extreme circumstances the children with ehcp get to do these things and the ones without an ehcp have to sink or swim. There is a school near me that has a farm on site and they do cross country every morning, milk the cows and basically wear the kids out so they haven't got the energy to get into trouble. But again, it's hard to get a place there. There are so many children who would really benefit from this kind of provision but can't get it.
I know it costs money but I'm sure it costs the state more when these children end up in prison than it would to have given them support when they were younger.
In a lot of ways we are lucky. Dh and I are both trained professionals in the field so we know a fair bit about SN. We can work out that our dc has autism and crack on with supporting them while we wait 3+ years for an official diagnosis. We have me as a SAHM and DH working SE from home at less than minimum wage so that we can be there when needed for the dc. We are broke and most of my clothes have holes in but it's worth it. A lot of parents don't have that option though.
I just despair at the whole system. These children and parents need practical support, appropriate education and prompt diagnosis.