my gcses arent that good, do i have a chance at top unis ?

my gcse results weren't that good, i got 7,7-6,6,5,5,4,4 the 7 being in english language and 6 being in maths, 7-6 in combined science and the lower grades in irrelevant subjects . im doing maths chemistry and economics a levels, and i want to study bsc economics at top unis like warwick, UCL and LSE , but it says on their site it says they prefer 7s and 8s and that mine would be considered the minimum. if i really work on my a levels, predicted grades and personal statement do i still have a chance, or should i just consider other slightly lower tier unis ?

yeah I want to when im in year 13

LSE's BSc Economics course unofficially requires further maths a-level. Only exception is when a student's school doesn't offer further maths as a subject.
In contrast, places like Warwick and UCL really like it when you have further maths, but they don't actually require it like LSE does.

okay , but are my gcses alright to apply to those top unis or should i consider settling lower ?