I could see them running on even less days if the trains are not full or when they replaced all with a newer higher capacity...
and btw with regards to cuts, they have closed their domestic department already so if anyone need to buy CIV ticket, you will have to do at the railway stations, we got ours this week from Virgin , just had to show them our eurostar reservation (we dont have tickets as going indirect so will have to print at eurostar station) and got it there, first cashier didnt know about them but have asked colleague and we got them fine...