Stay or Go: Should I withdraw in my final year and apply to a Top University?

To be honest, your classification, while important, is very unlikely to be the only factor and nobody here can give you a magic number to aim for that will definitely get you in. It seems like you're hoping for a different answer to the ones given to you on the last three threads you made about this dilemma; they're not going to change.

The fact of the matter is that you need to do as well as possible to get into the universities you're thinking about. Don't dream up all these hypothetical 'what if' scenarios to try to get precise answers -- nobody here can tell you, on the basis of your friend getting into LSE with 65 percent, that you will definitely get in with 67 percent, which is what I think you're hoping for.

Just do your best and see what happens.

In some universities consistently averaging above 70% in your third year (and around 67% overall) will get you awarded with a First even if you've done poorly in 2nd year.
There is a special word for this sort of "rounding up" but it escapes me.

In no way was I suggesting that a grade of 67% would guarantee me a place there, but I completely understand you.
The reason I am asking so many questions is because I want to know whether I should bother sending an application if I were to receive these grades.
Thanks for the help.

What sort of academic references do you think you could raise from your current uni? If you come out with a First, this would do you no good if your referees thought you weren't up to it.