After a very quiet period at LGW, things have collapsed somewhat from a 777-200 perspective with some issues which explains why G-YMMK has headed off at 12:53 to try and retrieve things slightly:

G-VIIO BA2159 LGW-UVF
G-VIIP BA2161 LGW-ISB
G-VIIR LGW allocated BA2167 to TPA with late start
G-VIIT BA2279 LGW-YYR
G-VIIU OOU @ LGW
G-VIIX BA2205 LGW-PUJ
G-YMMA MRU allocated BA2064 to LGW tonight
G-YMMB BA2201 LGW-CUN (which I think conveys yestday's BA2203 pax?)
G-YMMC LGW allocated BA2263 to KIN
G-YMMD LAS after BA2277 15/7 with inbound BA2276 cancelled
G-YMME LGW after BA2203 15/7 returned to LGW and cancelled
G-YMMF LGW allocated BA2203 to CUN this afternoon

Loaned in from LHR
G-YMMK - BA9150 LHR-LGW allocated to BA2035 LGW-MCO
G-YMMP - BA2037 LGW-MCO

Cancelled
BA2039 LGW-MCO (has been rescheduled as BA2035 so the passengers can be dealt witrh more easily as less seats in new aircraft I believe)
BA2273 LGW-JFK - properly cancelled with no replacement and pax rebooked from LHR where possible