Thick white morning frost, rather cool day but less wind and a little warmth in the sun. To Wimbledon Common to see models. Jones(?) & Booker were there; Jones' model flew out of sight in 7 min 55 seconds. The flowering trees are coming out now and Spring is well on the way. Night warning at 11.51 p.m. All times are now 2 hrs ahead of Greenwich Mean Time. The raid was not within sight or hearing but many machines came back this way from N. to S. and some were fired at. All clear at 4.25 a.m. on 5 Mon.