Debated this on a nightshift recently. Can't see how this is an improvement to the current services provided especially when a/c are piling off the ocean at 3am in trail at most levels above FL300. How will procedural cope with that?
Or if it's maybe for the 2 hour block where it, sometimes, is quite quiet, I can't see how that will be more cost effective for anyone involved considering the setup costs, validations, training, lack of directs, and on all sectors I can think of where it could be used, a sector team will still be needed to handle a/c requiring descent into the uk airfields and dublin/amsterdam (i.e. those that start descent in London FIR)