If you have two as levels : ICT and Maths
And will gain another 4 as levels at the end of this year
You will need to secure 3 a-levels in three of:
maths, chemistry, biology, physics or r.s
Does that help you?
You could get an a-level in biology, maths, chemistry and have as levels in physics and ICT and meet all the requirements
so you do not have to continue with physics