hexagon789
Veteran Member
12 originally for five circuits (4 in permanent traffic, and one stabled hot spare at Eastfield that worked over on a morning peak extra). Another 4 locos were converted in 1984 to allow all Glasgow-Aberdeen to become push-pull in May 1985 adding three circuits. Edinburgh-Aberdeen also became push-pull from May 1986, but there were only two return internal trips on that route, other services being through HSTs to/from London/Leeds or LHCS XC, that added one circuit.Also regarding the 47s, IIRC there were 10 47/7s to run the service? Presumably the push-pull only needed 4 diagrams (as I would guess it would be possible to turn them around in 10 minutes) in which case they had quite a few spare locos! Presumably as the locos were 'thrashed' there was a relative high chance of failure.
Markedly different from the contemporary railway!
In May 1987, the Mk2 circuits were modified so that some swapped destinations at Aberdeen. A set from Glasgow might work back to Edinburgh for example.
47713 burnt out in 1988 and 47497 was converted to 47717 to replace it.
So 17 locos were converted in total. 12 existed 1979-84, 4 extra appeared in 84/5, one burnt out in 1988 and another was converted to replace it. There were never more than 16 in existence at any one time.