Yes but its a different type of service to BA, lots of BA pax had onwards with BA or other airlines from LGW.
BA also had a lot of card holders on those flight, these guys will have no doubt gone over to the LHR service where they can collect their points.
There was a rumour that with the upcoming longhaul from NCL and the long haul market for jet2holidays that will come with it, they were going to offer connections upto NCL from LGW and start advertising down south, not sure tho.