That will be because of the odd train having been cancelled which could be for a variety of reasons including non-availability of train operator or defective train, rather than the nature of this thread which is non-availability of service control staff.I've generally noticed a pretty wonky/uneven service on the central line recently. Often 5-10 minute gaps at Stratford; which at busier times leads to very very busy trains. Is this related to staffing issues? I rarely noticed this a cpl years ago.