Before World War Two, the Luftwaffe intelligence assessment teams under Professor Dr. Heinrich Steinmann were interested in electricity supply. Steinmann believed that the vulnerabilities of the electricity generation and supply industries made extremely valuable strategic targets. Swansea’s power stations were particularly interesting due to their importance in the South Wales power generation network.
Swansea had two power stations, the Strand Power Station (opened in 1900) and Tir John Northeast of Kilvey (opened in 1935).
As a very modern and efficient power station, Tir John was identified as a strategic target as part of the Study Blue research into conducting an air war against Britain. In the Luftwaffe target lists, Tir John was assigned Target number GB 50 56. The full story is in Eye of the Eagle: Luftwaffe Intelligence and the South Wales Ports 1939-1941.
Below: a 1930s illustration of Tir John North power station (Kraftwerk) from German intelligence records.
Nigel Robins 