Susan insists on traveling to Manchester for the birth of Janey's baby, and the journey triggers flashbacks of Nick's birth.
Hearing that Janey is about to give birth Susan insists on Ben driving her up to Manchester to be there for the happy event. on the way up they think back to the 1970s and recall Nick's being born though when they reach their destination they find that Janey has already had her baby and is going to call him Kenzo.—don @ minifie-1