DYRMS
Gaylord, you beat me to it....
As this is a UK Mil Forum, surprised that no-one had mentioned DYRMS yet, esp. as it is now co-ed and takes offspring from all 3 services, unlike in my day!
As far as I know also, "compassionate" admission still exists, but I'm sure the School would be able to confirm.
Sadly I suspect there could be more of them these days. In my time, (70's, 80's) there were on average a couple of lads in each years' intake of approx 75 that fell into this category.
Sadly, the School also suffered it's first casualty of a former pupil in the Middle East last year.....RIP