Of course, if the 3rd had been built at the right time, then the M25 would have happened AFTER it. Just like if they'd built T4 at Perry Oaks - then the access roads to the M25 would not have had to be so tortuous and confusing. Of course, that would have been if politicians had done the right thing 30 years ago. Or even 20 years ago.
Of course what this means is - as predicted - the 3rd will never be built.