57306 Her Majesty's Railway Inspectorate (+ 12215 + 12324 + 12304 + 10305 + 12315 + 82220, the "TfW spares set") 5Q86 12:05 Wembley - Eastleigh
The 57/3 had worked from Reading in the morning, and returned there in the afternoon, via Worting.
DVT 82220, which along with 12215, 10305 and 12324, previously ran in set BN18.
66792 has a new Collaboration nameplate, which appears to to have been applied at Eastleigh, and unveiled at Felixstowe on 27th April.