As I was driving out the village this morning, I heard a weak ID on 145.650. I was pleased to identify it as GB3HS, the Humberside repeater, which is over 150 miles away from me. I don't hear that more than two or three times a year, so was interested.
The barometric pressure had fallen about 4mb overnight from 1021 to 1017 - which had no doubt cause the enhancement. There was a little mist around - another sure sign of tropo.
Just before going to bed last night, the F5XAM beacon near Calais was 2 to 3 s-points up on usual on 144.424. I got the impression it was one of those 'big enhancement over fairly short distance' type openings.