When was the last time there was a Cardiff to Newcastle service? Must be 25 years at least.
And when was the last time the Cardiff to Nirmknghams were anything longer than 3/4 coaches?
And why is the rolling stock to Portsmouth inadequate?
Below is a photograph of a Voyager leaving Cardiff on a service to Edinburgh via Newcastle in 2006. Of course, this was the result of the so called ‘Operation Princess’ run by Virgin who had completely underestimated - along with the DfT - the type and amount of rolling stock that would be required for what is now called Cross Country Trains. They then had to make cut backs to try and figure out how to get themselves out of this mess with south Wales being one of the losers. Now, for years going forward, Cross Country has been charging high fares due to the lack of capacity on these long distance services that do not go into London.
You further ask why I said the rolling stock on the Cardiff to Portsmouth services is inadequate - well, just take a look at the photo of the interior of one of these 165/6 trains below. In addition, when coupled to make up 5 coaches, they have no gangway connection. I would suggest that GWR and the DfT should be now considering perhaps something like a Stadler Flirt bi-mode train for this route.
When was the last time that Cardiff > Nottingham's were anything but 3 or 4 coaches. Today the 7.04 from Nottingham is 2 + 3 = 5 coaches and this will form the 10.45 from Cardiff. This often seems to be the case - presumably to meet peak demand on the south bound trip? The 6am from Nottingham is only 2 cars and this forms the 9.45 back from Cardiff. Presumably XC know where to target what they have available but I would have thought it might have been best to run 2+2 where 2 trains are joined in order to run the 3 car train on its own and avoid a 2 car on its own.
PS. Although off the main topic, I see that the 9.56 TfW from Cardiff to Manchester (started at Milford Haven) is a 2 car 153 today. An old train meant for branch lines running on the main line linking major cities in 2021 - incredible. At least the Welsh Government are doing something about it - unlike the DfT in sorting out Cross Country.