From Monday (29th April), Stagecoach are adding extra services to the Humber Flyer - which gains the number 250 - between Hull, Barton and Humberside Airport. This means a half hourly service between Hull and the Airport, and combined with the 350 a service every 15 minutes between Barton and Hull.
The new Northern May timetable doesn't reflect this, but in terms of how it impacts bus-rail connections:
If the connection from the 0650 rail arrival at Barton to the 0653 350 is not made, there is a new 0728 250 Monday to Friday rather than having to wait for the 0743 350.
The connection from the 0751 (0750 Sat) rail arrival into Barton becomes the 0758 250, arriving into Hull at 0830 - currently the connection is the 0810 Humber Flyer arriving into Hull at 0843.
The 0947/1146/1346/1546 rail arrivals into Barton may connect into the 0948/1148/1348/1548 250 if on time (probably not wise to advertise such tight connections).
There is no 1720 Humber Flyer from Hull to connect into the 1755 rail departure from Barton anymore. The connection becomes the 1700 250 from Hull, arriving at Barton Interchange at 1731.
Disappointingly as well, the Northern timetable omits existing evening bus connections to Hull. No connections are shown out of the 1951 (1947 Sat) and 2155 arrivals into Barton, despite the 350 departing Barton for Hull at 1952, 2052 and 2255 (Sat Only).
Thanks very much for bringing this to my attention, I was not aware of these changes. I shall make enquiries and see what can be done to rectify this.