cjags is correct
The A320 will only be used for this TFS flight and will be a standby aircraft for the rest of the time. Whilst there are lots of aircraft sat around over the winter at various bases due to a more relaxed flying programme, it seems a good idea to ensure there is a standby in SEN as well as those in LTN and LGW and most of the other bases.
Those cold, foggy, dark and wintry days in SEN should cause a little less chaos this winter.
