Been playing with
https://www.google.co.uk/flights/
If you input Manchester to wherever we have a direct long haul flight its appears to be one of the few price comparison web sites that actually show our services ! (Albeit in some cases at base of page BUT at least they are on the 1st page not buried as per most sites).
Only one I could not find direct was Singapore.
Even Toronto with Rouge appeared !
MAN could do worse than add it to their own site !