Thug, I think the actual answer to this (as opposed to ridiculous sniping by Docspock) is that details will vary between schools. So where a school has training days out of term time and wants the TA or classroom asst to attend, that will be made apparent and they will be paid for that attendance if they are term-time only. Where a power-crazed teacher decides to stamp its tiny foot, teaching staff will be instructed not to leave the premises before 17.00 as well as ancilliary staff.
Most TA and CA roles are required for term time only and I expect this will effectively 'take care' of the leave issue. In all practicality it would not make sense to establish a separate leave entitlement beyond the school holidays. While most teachers are in the school building for for some of the holidays, it is not the case that all teachers are in for all of the holidays, so questions of TA task allocation would arise.
Coming down to your later post, this perhaps answers your query: the term-time only staff get a bit more in pay packet but are not paid for days they don't work. ie school holidays. The all-year-round staff get paid monthly, a bit less.
Putting in another end of the spectrum as a comparison, the advisers and consultants who bother schools from the education department are not on teachers pay and conditions, but generally have to sleep with someone important to be allowed to take leave when the schools are in session. It's all part of the realpolitik of being at work when the people you work for are at work. If you see what I mean.