This is a very approximate model of what London would look like under 6m of water. Parliament square is only about 5 or 6m above sea level and the Thames barrier protects it.. for now. The barrier was expected to be used 2-3 times a year, but is now needed 6-7 times.
Remember with sea level rise, it's not the average that matters, it's how high high tide gets!
Source data: LIDAR from DEFRA using most recent 1m scale DTM & DSM. Map data from openstreetmap.
Inspired by Extinction Rebellion. Keep up the good work.