IGCSE APPLICATION HELP

I do have another question. Does LSE do extensive research on the highschool students apply from? In my case, my school only offers a maximum of 7 IGCSE subjects which a student may take, I took 6, though when consulting my referee, she said she would'nt mention this detail in my reference letter. Does LSE fixate a decision on an applicant based on the quantity of their IG's? And will they research about schools extensively before making decisions?