College economics

Hi, I am taking economics, maths, physics and chemistry at A levels. I’m predicted to score all a stars in these subjects. I had all a stars in igcse as well. I’m thinking of applying to LSE, UCL, Warwick, KCL, and one safety. I have participated in various essay writing comprehensions and have written 2 research papers. However, my school does not offer further maths and thus I haven’t been able to take it. I’m looking to apply in bsc economics, what do you think are my chances of getting in. Would you recommend any other courses where further maths isn’t given as much emphasis?