I'm sorry to be a bit pessimistic but 'putting a bit away' and 'bursaries' and 'the OU would be another option' are a bit niaive, to say the least.
It's certainly my fault that I'm in the mess I'm in.....I'm trying to face up to the facts and turn things around. But......
(1) you'll find bursaries are mainly income-driven, not cash-available-driven, if you understand me
(2) let's assume that uni fees are £3,000 per year and the son or daughter in question will go there at the end of year 3 of the IVA - the fees will be payable in years 4 and 5 of the IVA, so £6,000 in total - so you have 3 years to save up £6,000 - let's assume the student-to-be manages to save up one third of this, that leaves £4,000 to save in 3 years = £111 per month. That's going to be out of the question if you're in an IVA, I'd say [I hope I'm wrong]
(3) I myself have done Open University courses but would not be daft enough to equate an Open Uni degree to one gained at a recognised university - in any case, do you realise how long an OU degree can take to achieve? A good deal longer than a 'university' degree
The more you look at it, the more you may realise that university education and IVA's are like oil and water [I'm sorry to say].