Assuming you've split at the usual places en route such as Cwmbran etc..
Yes;
Swansea to Newcastle on Friday, May 25, 2018. 2 adults. 2 x 16-25 Railcards.
Your outbound journey starts from Swansea at 16:55, but please arrive in plenty of time.
Board the 16:55 Arriva Trains Wales service to Manchester Piccadilly. details
Ticket used: Swansea to Newport (South Wales) (OUT portion). We weren't able to reserve any seats.
You'll arrive at Newport (South Wales) at 18:03, but stay on board, you're just splitting tickets here.
Ticket used: Newport (South Wales) to Cwmbran.
You'll arrive at Cwmbran at 18:14, but stay on board, you're just splitting tickets here.
Ticket used: Cwmbran to Church Stretton.
You'll arrive at Church Stretton at 19:36, but stay on board, you're just splitting tickets here.
Ticket used: Church Stretton to Wilmslow. You have reserved 2 seats in coach A: 16F (window, table)., 15F (aisle, table).
You'll arrive at Wilmslow at 20:41, but stay on board, you're just splitting tickets here.
Ticket used: Wilmslow to Manchester Piccadilly.You have reserved 2 seats in coach A: 17F (window, table)., 18F (aisle, table). why?
You'll arrive at Manchester Piccadilly at 21:09. Leave the train here.
You have a 10 minute wait at Manchester Piccadilly station.
Board the 21:19 Transpennine Express service to Cleethorpes.
Ticket used: Manchester Stations to Newcastle.You have reserved 2 seats in coach C: 21 (aisle, airline)., 20 (window, airline).
You'll arrive at Doncaster at 22:36. Leave the train here.
You have a 11 minute wait at Doncaster station.
Board the 22:47 Virgin Trains East Coast service to Newcastle.
Ticket used: Manchester Stations to Newcastle.You have reserved 2 seats in coach C: 04 (aisle, table)., 03 (window, table).
You'll arrive at Newcastle at 00:41
It is slightly difficult to understand how the raileasy journey planner managed to plan this journey, departing at 1655. The journey planner I’m looking at calls for you to have been on the 1621 to reach Newcastle at 0041.
I booked on the 29th of April. If I'd known in time I would have caught the 1621, but I had to work today as well so didn't have loads of time between finishing work and getting a cab to the station