British Rail Class EF1

British Rail Class EB1 and EF1
Type and origin Power type Electric Builder Darlington Works Build date 1914–1919 Total produced 10
Specifications Configuration: ​  • AAR B-B  • Commonwealth Bo+Bo Gauge 4 ft 8+1⁄2 in (1,435 mm) Electric system/s 1,500 V DC Catenary Current pickup(s) Pantograph Traction motors 4 x 275 hp (205 kW), Siemens
Performance figures Power output 820 kW (1,100 hp) No. 11 after 1942: 937 kW (1,256 hp)
Career Operators North Eastern Railway London and North Eastern Railway British Railways Class LNER and BR: EB1 and EF1 Number in class 10 Numbers NER: 3-12 LNER: 6490-6499 BR: 26502-26511 Locale North Eastern Region Retired EF1, 1950–51 EB1, April 1964 Disposition All scrapped

The Class EF1 (Electric Freight 1) was a class of electrically powered locomotives built by the North Eastern Railway from 1914. They were built to haul coal trains from the mines at Shildon to the docks at Middlesbrough. In common with other LNER electric locomotives, no classification was given to these locomotives until 4 October 1945, when nos. 3-12 were all classified EB1 (Electric Banking 1) although only no. 11 was actually modified for banking.^[1] It was expected that all the locomotives would be similarly modified, but this did not happen, and the remaining locos were classified as EF1 (Electric Freight 1).^[1]