Apparently the Euston to Watford line has had 4-car trains ordered. At
the moment, UIVMM, it has 5-car trains. Is it going to switch from 3tph
to 4tph at the exact same time as the new stock starts? Even so, 15 cars
per hour to 16 cars per hour is a very modest increase, especially when
the increased frequency will increase usage (mostly at the expense of
the Bakerloo). I wonder why they didn't order more of the current trains
and run 5 cars at 4tph?