Episode four in the series covers a very different industrial scene to the previous three. There may have been few major coal reserves in Southern England, but the area had a huge variety of other commercial activity employing steam power in the 1970s.

Wonderful, previously unpublished film footage, location maps and an in-depth script reveal the fascinating story of steam in the south during this forgotten decade.

Locations and Locos featured:

• British Sugar, Ipswich - P2000
• CEGB Rye House - RSH7597
• Proctor & Gamble, Thurrock - AB1472 - BG2370
• NCB Betteshanger - HC1754
• NCB Snowdown - AE2004 - HE3825
• Imperial Paper Mills, Gravesend - AB1471, 1496, 2373
• Empire Paper Mills, Greenhithe - AB1561
• LT, Lillie Bridge & Neasden - L90, L94, L95
• CEGB Acton Lane, Willesden - AB2069, RSH 7386
• Slough Estates - HC1709
• CEGB Lower Earley - RSH7058
• MOD Bicester - HE3797
• MOD Long Marston - HE3798
• MOD Marchwood - HE3792
• NCB Kilmersdon - P1788
• Par Docks - BG3058
• Falmouth Docks - HC1632, HL3597, P1530