Home City Centre Railways Departmental Loco at Peterborough North City CentreRailways Departmental Loco at Peterborough North June 4, 2016 An undated image showing 1923 built LNER Class Y3 Sentinel Shunter #18 at Peterborough North. This was one of 32 vertical boiler shunters purchased by the LNER from Shrewsbury based Sentinel Waggon Works between 1927 and 1931.