One thing I have to admit by PIA is that they prioritise Manchester than anywhere else in Europe as they have a strong link with Manchester which I have read previously from pakistani news articles.
Another thing is that they must have good loads Cargo/passenger pax... As they are still with us and even though they stopped the 747-300 they still kept us prioritised with 777-200/777-300 not like other UK spots where at times they used to put the A310 on service.
Also does anybody know the feed of cargo into the UK with pia? Is it London Heathrow or Birmingham or us? As they do tend to keep specific cargo on certain flights even if the destinations london they will wack it onto a Manchester flight