The network issues between UCL and Github were diagnosed as a faulty UCL firewall and fixed.
Standard tile layer
Tile servers are upgraded to OpenStreetMap Carto 5.2.0.
4 1U servers were removed from UCL for disposal.
Several failed or failing disks were replaced in machines.
Two servers to replace stormfly-01 and stormfly-02 have been installed at OSUOSL. One is planned to be a tile cache.
Some services have been upgraded to Ubuntu 20.04.