Each local authority is different. This is a real issue as things are not consistent and it affects the advice given.
In our LA, we are expected to account for the first £6000 of support from our own budget. However, due to new arrivals and changing needs we consistently have more children requiring support than £6000s. Also worth pointing out that this £6K may not be spent directly on your child in particular - it may pay for a TA to do a group intervention, to work with a small group etc. It may not mean direct 1:1 support for say, half a day.
When we decide a child needs 1:1 support, we apply for high needs funding. We outline how we have already spent the £6000 and what we have put in place so far. We outline what we need from them to support the child and how we'd use the money. If it's given, we can get 1:1 support. If not we reapply or just have to manage without 1:1 as we can't afford it.
Occasionally we get a child who immediately needs 1:1 support. Our LA will only give top up funding after two terms of poor progress, so often we have to fund 1:1 for those two terms from the budget while we put together an application for high needs funding. This impacts on the £6000 that other children benefit from - absolutely not ideal but we can't invent money.
In our LA, we are told to only apply for an EHCP if a child is making absolutely no progress despite lots of intervention and support. If a child is making ANY academic progress, it is declined as it is seen that what the school is doing is working.
I am a SENCO at a school with a high proportion of sen.I absolutely support parents with ehcp applications etc but I am so limited by my LA. There are a limited number of specialist SEN places in our LA and they seem to think an EHCP is a passport to those places (even if no intention to move out of mainstream!!)
Schools are so short of money. We are struggling and we want to provide the best. planetary if your child is not receiving additional funding, and they don't have a TA to provide the intervention suggested I don't know what we as a school would do. I can't invent the money to pay for a TA even though I'd love to.