I can confirm that you can receive complimentary tea/coffee/hot chocolate/water/yucky coke, alongside crisps/very nice orange & milk chocolate cookies/ shortbread, from the shop in Coach D.
I actually got offered my first lot of refreshments at-seat yesterday, as we left Preston for the S&C, but that was only because it was extremely quiet and they appeared to have a few catering staff onboard the train.
Despite 'duff' gen on one of the yahoo groups (May have been the 'virgin-trains' one) saying that the diversions were going to be wedged in, as a result of 5-car sets running every 2 hours, in place of the usual more frequently ran service via the LD, my train was incredibly quiet in both directions. The same happened last year.