British Midland are due to make an annocment tomorrow tuesday on routes out of LHR that they are cutting back on.
If this is the case some slots will be made available for other routes so Jersey might know by this time tomorrow if there will be a Heathrow route to and from Jersey and what type might be operating.
If so I would have at a guess an Airbus 319.
As they saying goes bring it on, Jersey needs more routes as the Stansted is now dead again with the last departure at 0802 this morning.