No, it was due to the speed that the timetable had to be put in, which precluded the planners being able to do it in time - the DfT wanted “COVID secure” timetables in by the 17th. So a previous one was just “taken off the shelf” and implemented.
These timetables were supposed to run to the 21st of February, when, if the COVID situation improved, they would revert to the December 2021 timetable, as long as the TOC resources were there and there wasn’t any IR issues. Last week the DfT told the TOCs (& NR) to bring it forward and the current plan is to do this on the 14th with TOCs under instructions to try and limit overcrowding in the meantime, by inserting trains back, if possible.