Here are some pictures showing the flooding on 24 Dec.
View from the Eastern Aerodrome boundary
Looking towards the hangars from Twy A
Twy A looking north
Hold B1 looking towards the maintenance area
Runway 26L threshold lights just visible
It would seem that the flooding was due to the Salfords Stream that runs along the eastern and southern side of the Aerodrome overflowing.
By 1430 hours the worst was over.