. I refuse to move out and pay rent because the money is just completely wasted.
as an aside, I just don't understand this kind of opinion whatsoever. It seems to be strangely common in the UK, that it is some kind of right to buy a house and you are deranged if you would even consider for a second the notion of paying rent. Meanwhile the rest of the world pays rents and don't even consider buying a house until they are in a much more financial secure environment.
Firstly, money spent on rent is probably the most important place to spend money after food and water - it is putting a roof over your head, giving yourself a home to protect you from the elements. A fixed address is also a requirement for many things like phone contracts, credit cards, having a job.
Secondly, you have no grantee that buying a house is not completing wasting your money, what if there is a crash in house prices - suddenly you have lost tens of thousands, or more.
thirdly: you must now realize that getting a mortgage just means you are wasting money on interest.
EDIT: to add some obvious advice, save up for more of a deposit so you can get lower rates and require a smaller mortgage (large deposits are really a double win here). Try to get a shorter term mortgage so you will pay less total mortgage but will be paying in much more each month. lastly, get a mortgage that allows large over payments and pay in as much as you can to drop the capital that you owe. If your monthly mortgage on interest is 450 quid and you drop don 1500 a month you will pay much less interest in total. If you cannot afford to do that you can join the rest of the world in simply renting accommodation.
As a more serious answer, have a look to see what rates you would get is you had a 20% deposit. It might be worth saving up for an extra year.