According to TfL, the railway line at New Cross Gate will be closed for 52-hours on 10th-12th May while the new bridge for the northbound ELL extension is dropped into place (the bridge structure itself is nearing completion, you can see it on the left of the tracks heading towards London Bridge). I don't object to the closure, it's in a good cause, but it looks as if there will be no trains to London Bridge in the morning rush hour on Monday 12th, and possibly disruption in the evening too.