31327 climbs away from the site of Teigl Halt with the "Trawsfynydd Trekker" railtour on 27 August 1994. 31190 was on the rear of the train, the top and tail formation being required due to the lack of run-round facilities at Trawsfynydd. This was the first loco hauled passenger train run over the ex GWR route to Blaenau Ffestiniog since January 1961.

A pair of Class 31s on a nuclear waste train approaches Dolwyddellan in May 1995

A pair of Class 31s propel a nuclear waste train along the Trawsfynydd branch near Manod. June 1995

31201 and 37107 approach Blaenau Ffestiniog in May 1995 witha loaded nuclear waste train from Trawsfynydd.

A pair of Class 31s pass Roman Bridge on a nuclear waste train. November 1994.

40122 / D200 climbs away from Dolwyddellan on the 14.40 Llandudno - Blaenau Ffestioniog in September 1986

37107 and 31201 climb towards Ffestiniog tunnel at Blaenau Dolwyddelan with a nuclear waste train for Trawsfynydd power station. The 37 was a very unusual visitor at this time and was deputising for a failed Class 31. May 1995

A pair of Class 31s return along the Trawsfynydd Branch near Teigl with a loaded nuclear waste train from Trawsfynydd. November 1994.

31327 leads a railtour back down the Lleddr valley near Dolwyddallan. August 1994.

37401 and 37417 climb out of Blaenau Ffestiniog past the slate waste tips of the Oakley Quarry with the return leg of Kingfisher Railtours "Welsh Mountaineer" 16.15 Blaenau Ffestiniog - Peterborough)

As the sun plays hide and seek with the clouds, 37417 and 37401 climb towards Ffestiniog tunnel with 1Z37 - Kingfisher Railtours "Welsh Mountaineer" (05.50 Peterborough - Blaenau Ffestiniog)