The delays are until May AFAIK, the main National Rail timetables only have major changes a couple of times a year, but they want the through connection to Cros

The delays are until May AFAIK, the main National Rail timetables only have major changes a couple of times a year, but they want the through connection to Crossrail open ASAP, so have an inelegant kludge of trains waiting outside Paddington to sync up the Crossrail core and NR timetables until then.