Get a job.
No, seriously. You want to get a job because (1) a stable income will make it easier for you to get financing to do your RE deals, and (2) you'll be able to save 10k GBP in less than a year if you keep expenses low enough.
You need to switch your thinking from short term to long term.
Kill expenses > get a regular income > save as a habit > grow income > start business > invest business earnings into hard cashflowing & appreciating assets. Your income will come from your business and your net worth will come from your assets. Eventually you'll leave the job but the job will teach you a lot, it will give you a stable income, and it will put you in front of business opportunities.
I know you're thinking this way sometimes, otherwise you wouldn't have had the idea to get 10k GBP for a
real estate deal. Problem is, you end up focusing on the cash and not enough on the actual end goal: wealth and freedom.
Real estate investing takes money, or access to money. It's easier to get access to money if you know how to use your own. One day you'll be able to do RE deals with $0 of your own money because you'll know how to find good deals and you'll know how to raise cash. You don't know how to do either right now and if you only have 1k GBP in your bank then you don't even know how to make or manage money.
Think long term.