I may have misread this local rail campaign website news update, it appears that when Platforms 14-16 are closed from the timetable change next week, the connecting walkway from Platform 13 to the Southeastern 1-6 will also close as part of the refurbishment works.
If so, will the footbridge be able to stay open to connect 8-12 and will Platform 13 users have to walk to platform 11/12 to connect without going through the gateline?
If so, will the footbridge be able to stay open to connect 8-12 and will Platform 13 users have to walk to platform 11/12 to connect without going through the gateline?