It’s up to you, but bear in mind if the 13:41 arriving service is then cancelled, you’ve got just over an hour to make it to the terminal, drop bags if necessary, pass one of the UK‘s most notoriously busy security queues, and then get to the gates of which some are now a very long walk with the shuttle closed, before the gate closes some ten fifteen minutes before the departure time.
This is an interesting observation. Its probably due to XC’s main priority for these calls being a connection to Bristol and a strengthened connection to Birmingham, probably the primary uses for the station as a park and ride facility beyond Worcester itself, and it doesn’t really matter which of these calls for these two destinations as they both serve it.
Therefore, as the ex Plymouth and ex Manchester probably had the most slack to allow the calls, they’ve gone for these.