Is it too late for A level Maths?

I did really bad in all my mocks throughout year 12 and 13 but i've locked in since the end of February but what are the realistic chances of me getting above a D?

How bad is "really bad"? How much effort did you put into those mocks?
If you didn't put in much effort, and you've now decided to study hard, then achieving above a D is certainly possible.

Really bad like U level bad but you’re right, I didnt try at all tbh but everyone I speak to says getting a decent grade at this point is too optimistic

I did really bad in all my mocks throughout year 12 and 13 but i've locked in since the end of February but what are the realistic chances of me getting above a D?

prioritise the topics worth the most marks, like differentiation and integration, and a pass should be possible

Given that we're talking about A level Maths, what grade are you considering to be "a pass"?

An E, which is considered a pass in A-Levels (as they said they’re getting a U, though a D/C, maybe B, is possible with effective revision from now).

I did really bad in all my mocks throughout year 12 and 13 but i've locked in since the end of February but what are the realistic chances of me getting above a D?

I did really bad in all my mocks throughout year 12 and 13 but i've locked in since the end of February but what are the realistic chances of me getting above a D?

Get the a level maths CGP book, read through it making notes and do some past papers

It's possible.
What aren't you doing well in when it comes to a level maths for both as and a2 that you've learnt so far.
What are he topics what is it that's not making sense for you

In AS the log and ln stuff doesn’t really make sense yo me which then Im struggling with year 2 differentiation and integration, then there’s all the cos(a+b) rules which all make 0 sense to me so basically a few year 1 base knowledge are making year 2 so hard to understand