@Trappedandunhappy 'one less holiday a year, a one step down model of car, cancel the tennis club membership, fewer meals out, etc. we are talking about finding an extra couple of thousand a year. Just not having that weekend shopping trip to New York pays for that immediately.'
You may be trapped&unhappy, but taking it out on others won't make you feel any better.
My ds is on an academic scholarship, which means I 'only' pay £9k a year. To afford that, we haven't been on a foreign holiday since 2017, I don't have any sports memberships. I don't have any meals out unless they are company-business and I've never been to New York, shopping or otherwise.
You really haven't got a clue have you?
I'll put the £1,800 extra for his last year on a credit card, or get an overdraft and pay it off over a few years. I won't let people like you wreck my ds' chance of decent a'levels, no matter how hard you try.