In response to Bristol Traveller - there was no cargo because the airport was unable to provide such facilities. Whilst runway length posed a problem for some days (09 and only 5-10% of the time), there was plenty of capacity for cargo. It was carried in the early days but forwarders and CO had bad experiences with Ward Aviation.
The airport has never had any really interest in providing cargo facilities, as proven in their master plan. Without this I believe they are doomed in trying to get any major carrier link.
Shame as there is a big demand with Avonmouth just down the road.