The Liverpool Echo has the story on its web site – see link above
On this occasion (today) I understand that snow gathering above the collector shoe, which takes power from the 3rd rail, on the electric unit caused the failure and indeed the fireworks. Could the 507/508 electric trains not have been checked for such snow build up?
But electrical problems on this line, particularly north of Maghull in recent months have caused previous train cancellations due to power failures. Clearly these power failures were for Network Rail to resolve and we all hope that they have now cured the problem power supplies.
Travellers going north of the present Maghull Station in particular must be really cheesed off as their trains have been taken off due to the building of the new Maghull North Station and because of power supply issues in recent times on top of the strikes that have bedeviled the whole Merseyrail network of course.