Non-EU International moving to the UK

Hello, I'm a 17-year-old Non-EU International looking to move to the UK for an economics degree to hopefully break into IB. My UCAS application is mostly complete, and I am confident I can get into at least Warwick, maybe even LSE.  Otherwise, please forgive my naivety. I am mostly fluent in English, I'd say C1 or B3 on the CEFR Scale. I was curious as to what schools to pick as my safeties, as I am already applying to economics programs at LSE/Warwick/UCL. The living cost of London is a slight concern, especially as fees for overseas students in the UK are usually 3x higher than for UK nationals, but if I get an LSE offer, it should be worth it in the long run. I have currently picked Durham and Bristol, partly due to their somewhat semi-target status based on what I read on this forum. I was hoping that someone who is currently in a semi-target, or someone with some insight into the recruiting dynamics, mostly for London, could advise me if I should pick something else. Thanks