Mickle Trafford is very difficult to get a good view of. You can see it end on from the greenway path from bridge (which is now part of the path which continues right down to station lane) but from the roadway it's pretty much hidden from view by the bridges and embankments in the Warrington/Mouldsworth direction. A long lens may be useful.T
Not too sure about Mickle Trafford. I know there's the Millenium Greenway footpath along the old railway line that used to go to Chester Northgate from Mickle Trafford, but not sure how close you can get to the signal box. I think the path ends at a derelict bridge going over the existing Manchester-Chester line so you might not be able to get any further than that. Maybe better shots from Station Road in Mickle Trafford.
Or the Holyhead - Cardiff loco hauled five days a week, or on six days this week.Best view is from a passing train with opening windows, which nowadays usually means a charter train.
I love that MOD story at Sealand!