I did look around the forum but I couldn't see this posted so sorry if it has already been mentioned elsewhere.
This NOTAM is posted from May 31st:
Times should be the usual +1 for local.FLYPAST BY BATTLE OF BRITAIN MEMORIAL FLIGHT ACFT, 3 C130 AND 1 C17 WI 3NM RADIUS 5130N 00159W (LYENHAM) 11-05-0140/AS 1. SFC - 2000FT AMSL, 31 MAY 09:00 2011 UNTIL 31 MAY 09:55 2011. CREATED: 05 MAY 15:14 2011
HTH
Stu