Bristol Lulsgate (BRS) has a short runway of 6,600 feet. It also undulates quite noticeably, is at a 600 foot elevation and experiences severe weather problems with fog and mist throughout the year, although the winter months are usually the worst.
A year or so ago a Cat III landing system came on line on the western runway, but the reciprocal eastern runway cannot be so equipped because of falling ground immediately outside the airport boundary. Even on the western runway diversions still take place because many of the smaller regional jets in particular are not Cat III equipped.
Although its smaller neighbours (in passenger terms) at CWL and EXT do have occasional trans-Atlantic flights, BRS rarely does. Its last 'across the pond' service was a weekly Canada 3000 B 752 to Toronto before that company went bust. Even then the flight routed via GLA.
BRS management insist the runway is capable of non-stop 757 flights to eastern USA and Canada but I remain to be convinced that this is feasible on a regular basis.