Ah, my parents sound so generous. I don't have to pay anything but it depends on your situation. Personally, i have to retake anatomy, so i have to revise for that, plus i've got 5 weeks of work experience to get on top, so i simply have no time to get a job. My parents see that forcing me to get a job isn't practical and it would actually harm my studies and future, so they support me.
My friends who aren't doing anything/bumming around generally get charged board and lodging for staying at home. To be honest, having a 3 month holidays between uni years, what else are you going to do? Sure, you could go on holiday for say a month, socialise with friends for a while, but i know i'd soon run out of money and get bored.
The other alternative is actually helping out around the house, you have to do it at uni, why not at home. Cleaning and cooking isn't particularly difficult, or am i mentally and physically superiour? Surely helping out would reduce your board and lodging cost? Or is it too difficult? Am i really mentally and physically superiour?
Plus, i have a friend whose parents charged him board and lodging while he was living at home after school. He thought it was a bum deal but when it came to him looking for a house to buy, his parents handed him a lump sum of about £10k. While he was paying lodging fees, his dad had invested it into a high interest savings account for him to use as a deposit on a future house. If his dad hadn't done that he'd probably have spent it on getting drunk and still be nowhere.
And paying £250 a month is a good deal. At uni i pay £3k a year tuition fees. £3-4k a year on accommodation and about another £3k on living expenses, socialising, books, materials, etc (and in later years that can only go up). I'd love to have £500 a month to spend on whatever i want, not food, laundry, rent, transport, etc.