While all this had been
going on the Holyhead bound Pendolino had arrived from London
Euston running about 10 minutes down. However, although the shunter
and several others had appeared to process the switch from AC
to diesel, there was no indication that 57315 was being started
up. Time passed and still no sign of 315 becoming active when
57304 appeared in the distance presumably to act as, well, thunderbird!