If it helps sway your decisions, Sussex has a reputation for accepting mature students. Just out of personal intrigue, I have been trying to count how many over 21's are currently in the Business school in second year with me at the moment. There's roughly 300 total students across all the various business degrees and I know about 20 or so of that 250 are over 21 - but I'm sure they're more. Amongst them are a 27 year old single Mum and a 21 year old single Mum who are giving it their all to get their education.