Foxtons will tell you to get more money from Halifax, because as far as they're concerned there's nothing wrong with the way they've valued the property - remember: they're not working for you.
As an alternative, they'll suggest that you use their mortgage broker who will miraculously be able to find you the extra 40 large.
So much this, or alternatively they will suggest you try a different lender as yours are unreasonable. Failing that they may try to discredit the valuer and make accusations of them being unprofessional, in order for you to try again with someone else.
Foxtons will tell you to get more money from Halifax, because as far as they're concerned there's nothing wrong with the way they've valued the property - remember: they're not working for you.
As an alternative, they'll suggest that you use their mortgage broker who will miraculously be able to find you the extra 40 large.