The thing is, you appear to be coming at this from the perspective of a parent of a (primary aged?) kid with SEN with no actual experience of how schools work. I'm talking about a real trip, a real TA, real interventions. You're making stuff up as you go along.
You are wrong there, noble.
My DC is has been at secondary for some years now. His Statement was ceased years ago and he no longer receives additional support for any SEN. He is doing well, better than would be expected for his age in many subjects.
I know how trips are organised and interventions are organised. I have done some work with schools before and I know how the schools I have had direct experience of organise their trips.
So now we're having primary school kids needing escorting to other schools by a member of staff, missing school in order to access an intervention that could have taken place at their own school? Also I don't know about your primary school but for my DS to get to the nearest primary would be about an hour of walking in total, along a main road.
Your son's circumstances does not negate the fact many schools are within walking distance to each other. Interventions can still take place at their own school too. Smaller more focussed groups can be used, cross age group groups can be used. Added to this IT facilities can be used to aid collaboration.
Yes schools collaborating together is good, but the idea of doing it just so you can justify 5% of a TA's time is ridiculous.
Realistically, we are talking about far more than 5% of a TA's time. In a group of 10 children, for PP targeted intervention, if just one child was not in receipt of PP, that would be 10% of the TA's time, for a start, if 2 or more children 20% and so on. The research gets skewed further every time practice such as this occurs never mind not addressing the needs of the children in receipt of PP who did not receive anything because their attainment was already high enough not to draw any attention.
It appears you want to minimise and dismiss every single point I am making. It seems to me, from your posts, noble, educational professionals are extremely motivated towards gaining additional funding and employing additional staff. However they are, apparently, less motivated towards accounting truthfully for where the additional funding has been spent, targeting funding towards where it lawfully is supposed to go and utilising additional staff in order to benefit the children they have actually been employed to help. Also there doesn't seem to be much motivation, apparent from your posts, for genuinely identifying the educational needs of this target group and actually meeting them.