UK Economics and Geography related course decisions

I'm trying to decide between the geography with economics course and environment and sustainable development with economics course at LSE, i've done research into both and I understand that differences but equally love the modules in both courses. The only thing is that the environment, sustainable development one seems to have a much lower acceptance rate and class size than the geography one.

Does anyone know anything about these courses and can help me decide?

For reference my A-levels are Maths, Chemistry, Economics and Geography