Look closely at the schedule for DUB-SEN-DUB on April 3 and you will see that although flight numbers and departure times match the LCY-DUB schedule, the arrival times are different. The SEN sector times as shown are 5 minutes shorter than the LCY times - so perhaps not a simple input glitch.
There are no obvious operational issues at LCY on April 3 and other services, including Flybe, are operating normally. Are they planning on using an aircraft or crew unapproved for LCY - possible I suppose but why ? Best to wait and see now I would say.