The class 319s have 2 toilets for 4 carriages which works out as 1 for every two carriages. They will be doing Blackpool to Liverpool - (+ SParkway?) Which 1.5 hrs end to end the same as Newcastle - Carlisle. The last I read the accessibility mods would mean getting rid of 1 to make a single toilet for a 4 carriage set although I am not sure how accurate that is.
1 per two carriages seems to be about the right number for regional trains. Intercity trains where people could spend over two hours probably need 1 per carriage. But that is just my opinion.
It's not just a question of how long the journey, but also how intensively used it is.
Plus the fact that Northern has a lot of routes over two hours anyway on which a 158 could turn up.
In terms of the 319's, they would be better taking a leaf out of the 321's book in which case, one of the two existing toilets was left in situ whilst the accessible one was constructed elsewhere on the train. In this case, 2 loos for a four carriage train seems adequate, however the bin's are used on the North's equivalent of suburban stoppers, rather than longer distance regional services where 158's are likely to turn up.
