More importantly (almost), does this mean that if I want to get a train out to Kent, Brighton or sussex that I will have to go to Charring Cross on the tube from London Bridge? Now that is a nightmare journey!
No, one stop on the Jubilee line to Southwark which connects to the Waterloo East platforms for Southeastern mainline services to Kent and East Sussex. Thameslink won't be stopping at LB at all during the main works, so not affected.
For those of you who'll use Thameslink north of St. Pancras, the tickets I believe already allow cross London transfer on the tube between London Bridge and King's Cross St. Pancras stations.