Warbling in the willows

At Girton this morning, one Willow Warbler was singing from the sallow scrub on the south side of the South-west Pit, my first of the year. Plenty of Chiffchaffs and a singing Blackcap were also present around the old stock yard, with 6 Sand Martins overhead - I hope the latter appreciate the fact that I spent an hour and a half digging back the eroded sand from under their nesting bank! Still no further sign of the Cetti's Warbler present earlier in the month; I guess it was just a prospecting bird which didn't find the site to it's liking, which is a shame.