Don't only look over the list of countries that London VO deals with but look how in a discriminating way they are treating with them.
Applicants of non-Muslim countries usually getting response from London VO within 4-5 months time after 2nd AOR but it is not the case with us.
If they are really that much in-discriminant as you said, then they should have given valid reason why they lost trust over Islamabad VO & put us in without-reason not ending wait? See how they are dealing with Indians & other Asians. For Pakistanis, they should have transfered our processing VO to any other VO in Asia rather London.
Truth is Truth, whether bitter or sweet.
Any ways, as we all want to be part of them, we don't like such comments & we already have put our birth country as secondary.
May Almighty Allah bless us & make our country that much great that no Pakistani never ever think of leaving it (Ameen)