Government probably didn't have the number yesterday. I think now 21 published cases of NHS staff who have died with Covid-19 (rather than 19) (but "after testing positive" may explain the difference for a couple of people who died at home while self-isolating with symptoms) https://twitter.com/SkyNewsBreak/status/1248887959157387264

21 NHS staff who have died and named publicly are remembered in this thread https://twitter.com/sundersays/status/1244318027769880581?s=19