I would question this rumour strongly. Sounds strange to me.
There is now way BE will roll over at LGW. Consider the routes it operates, long served routes. Like channel Island routes, who are up against airlines like BA, Aurigny etc. BE unlikely to drop the likes of GCI or BHD for that matter.
Would be amazed if BE axed LGW. Maybe scale back and increase aircraft size on some routes, but not a withdrawl I would have thought.