A few things seem to be afoot at the moment, one of those things is that Astraeus look to be purchased imminently by Zoom Airlines of Canada. Zoom and FlyGlobespan will be codesharing on some of the Globespan (Tour Operator's) charter routes from UK- Canada due to GSM's lack of capacity after Air Transat stop operating the routes under the current contract which expires this winter.
Astraeus have their 737-700's ETOPS approved and can already hit Deer Lake in east coast Canada from LGW. This would make Toronto a possibility from EXT be it with a tech stop for fuel.
Astraeus previously have used the 737NG's from LGW to Malabo in Equatorial Guinea too which is also a 7hr plus flight.
Watch this space.