Early Application

Hi guys,
This question is directed towards students who are passionate about economics and/or have studied at or are going to study in LSE (London School of Economics and Political Sciences). I am currently a fifteen year old student studying in the 10th grade, entering my second year of GCSEs. I take additional co-ordinated sciences, economics, extended cambridge maths, computer science, drama, english and mandarin. I was wondering, if I were to perform phenomenally in GCSE, and get mostly A* particularly in econs, maths and sciences, would I have a shot of getting into LSE after the tenth grade without taking the IB course or any A-Levels? Thanks. I am very active from an extra curricular point of view, taking part in internships, MUN and other activites.