The decision to lease and put into service was all done within a couple of months.
However my guess the carpets will be changed at a later date, as what is fitted will most likely be new, as both a/c had major checks carried out on them prior to Monarch taking them.
Due to the availability of man power and hangar space prior to service entry, most of the Monarch modifications were delayed till later in the year.
Seat covers were not available, time due to manufacture. Carpets, curtains and other cabin items would have come under when time available.