New
#320
Satya must have got the whip out. We will not be late with this release
These updates..
KB4505057 Cumulative update for 1903 build 18363.116
KB4505056 Cumulative update for 1809 build 17763.504
...both have the same fix in them: "Addresses an issue that may prevent access to some gov.uk websites..." In the case of 1809 it's the only fix, 1903 has one other.
I guess MS decided that blocking access to the UK's .gov.uk sites was a significant enough a bug to warrant an out of band CU.
BTW, my non-insider install of 1903 is not seeing KB4505057, I suspect it's only released for the RP at present. My 1809 did get KB45056 though.