Just had a look using Skyscanner at a random summer Friday in July for the late morning flight to SEN. Only full fares available at £162 and the seating plan shows three seats booked. If they were fly-flex fares how many cheaper 'fly' fares would there have been? However there is a train available that gets me into central London, about the same time as the flight would allow, for £70 so I would save almost a ton by going on the train. Even full fare on the train at that time for walk up punters is over 40 quid cheaper. I think some adjustment to the fare structure might be needed to encourage more passengers out Brampton way.