Not sure when, but it looks like Br Clan 4-6-2 -72002 Clan Campbell on a Glasgow to Manchester service 1x06 coming off the main up line at Hellifield and onto the Blackburn branch. A Blackburn local service with 42154 in charge can be seen behind it in the centre platform. Picture taken from the embankment over looking Hellifield south signal box.
Geoff Robinson