I note that Wikipedia has pages up for the new CAF units for Northern, confirming the class numbers, which I've not seen mentioned on the forum
Source in in here....
http://www.raildeliverygroup.com/files/Publications/2016-03_long_term_passenger_rolling_stock_strategy_4th_ed.pdf
Class 195/0 - 2 carriages - 25 units
Class 195/1 - 3 carriages - 30 units
Class 331/0 - 3 carriages - 31 units
Class 331/0 - 4 carriages - 12 units
Unsure where the sub class references come from - wiki artistic licence ?
Source in in here....
http://www.raildeliverygroup.com/files/Publications/2016-03_long_term_passenger_rolling_stock_strategy_4th_ed.pdf
Class 195/0 - 2 carriages - 25 units
Class 195/1 - 3 carriages - 30 units
Class 331/0 - 3 carriages - 31 units
Class 331/0 - 4 carriages - 12 units
Unsure where the sub class references come from - wiki artistic licence ?