On past experience this is not a heavilly loaded train at all.
That proabably explains why it has very cheap Advance tickets! It's very nice when you get a very quiet First Class carriage on a Pendolino, particularly on a breakfast/evening meal service, as the staff are even more attentive.
Pretty much the same as the 04:28 Glasgow - Euston, a service that previously started at Carlisle and has been extended to Glasgow (due to the slightly shorter journey times)
Previously the last southbound Euston service was between 17:10 and 17:30, and even this was relatively quiet
I agree First Class at these times is much better
I quite often get one serving between Glasgow and Carlisle, and another between Carlisle and Preston
However, after Preston there is usually only one
It is the same with the 16:30 Euston to Glasgow, but this has been incredibly quiet recently such that a second round of meals is often offered at around Rugby, the snack is then offered after Preston, then any left overs again on departing Carlisle