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Welding lengths of conductor rail together on site at London Bridge for the Thameslink Programme

Crushed stones - ballast - are dropped at London Bridge to form the base for new track as part of the Thameslink Programme

Conductor rail cutting in the rain at London Bridge as part of the Thameslink Programme

Southwark Cathedral keeps an eye on Network Rail's tilting wagons - carryring sets of points for Thameslink Programme work at London Bridge

The Shard looms over rail workers working on the viaduct at Ewer Street, Southwark, putting in a new set of points for the Thameslink Programme