This current coronavirus situation and the ongoing "lockdown" is leading to all sorts of changes in auction dates - the two most recent ones we know about are at Lockdales who are moving their sale on by two weeks from the weekend of May 16-17 to May 30-31 and DNW who are moving their May sale from May 13-14 to Thursday, May 21!
Both have gone "on-line" with no bidding in the room but of course telephone bidding is still possible so there's no reason to miss out!