British Rail Class 55

The British Rail Class 55 is a class of diesel locomotive built in 1961 and 1962 by English Electric. They were designed for the high-speed express passenger services on the East Coast Main Line between London King's Cross and Edinburgh. They gained the name "Deltic" from the prototype locomotive, British Railways DP1 DELTIC (the running number DP1 was never carried), which in turn was named after its Napier Deltic power units. Twenty-two locomotives were built, which dominated express passenger services on the East Coast Main Line (ECML), particularly London – Leeds and London – Edinburgh services, until 1978 when InterCity 125 'High Speed Trains' were introduced. 1978–81 saw them gradually relegated to semi-fast or newspaper–parcel–sleeper services along the ECML (destinations including

British Rail Class 55

The British Rail Class 55 is a class of diesel locomotive built in 1961 and 1962 by English Electric. They were designed for the high-speed express passenger services on the East Coast Main Line between London King's Cross and Edinburgh. They gained the name "Deltic" from the prototype locomotive, British Railways DP1 DELTIC (the running number DP1 was never carried), which in turn was named after its Napier Deltic power units. Twenty-two locomotives were built, which dominated express passenger services on the East Coast Main Line (ECML), particularly London – Leeds and London – Edinburgh services, until 1978 when InterCity 125 'High Speed Trains' were introduced. 1978–81 saw them gradually relegated to semi-fast or newspaper–parcel–sleeper services along the ECML (destinations including