Afterwards I cycled my usual 12 mile route over the downs, and it seems the day I missed during the week was the day a single Dotterel was found alongside a Golden Plover on one of the fields. At least the farmer is aware of these birds passing through.
Totals for Seaford Head are:
Wheatear - 10
Yellow Wagtail - 15
Whitethroat - 31
Willow Warbler - 19
Chiffchaff - 14
Spotted Flycatcher - 2
Reed Warbler - 4
Lesser Whitethroat - 10
Blackcap - 110
Grasshopper Warbler - 2
Redstart - 2
Garden Warbler - 1
Merlin - 1 fem
Chiffchaff by South Hill Barn
Wheatears by South Hill Barn
Grasshopper Warbler in Hope Bottom
Blackcap in Hope Bottom
Garden Warbler by Harry's Bush
Lesser Whitethroat on a coastguard cottage
Willow Warbler at South Hill Barn