Project commences, 21st September 2009. (Photo courtesy Richard Buckby)

With the site cleared, machinery is brought down from Wirksworth for the task ahead. 21st September 2009. (Photo courtesy Richard Buckby)

Drainage work north of Duffield Tunnel, 23rd September 2009. (Photo courtesy Richard Buckby)

Drainage work with Duffield Tunnel in the distance, 23rd September 2009. (Photo courtesy Richard Buckby)

A general view of the Duffield site before work commenced, 23rd September 2009. (Photo courtesy Richard Buckby)

Works train in attendance, 23rd September 2009. (Photo courtesy Richard Buckby)

Initial drainage work north of the station, 23rd September 2009. (Photo courtesy Richard Buckby)

Work begins on the run-round loop. 29th September 2009. (Photo courtesy Richard Buckby)

North of the A6 road bridge. 29th September 2009. (Photo courtesy Richard Buckby)

Groundwork to reinstate the run-round loop. 29th September 2009. (Photo courtesy Richard Buckby)

Work in progress south of Duffield Tunnel, 29th September 2009. (Photo courtesy Richard Buckby)

Sleepers are laid for the northern junction of the run-round-loop. 29th September 2009. (Photo courtesy Richard Buckby)

Track laying, 29th September 2009. (Photo courtesy Richard Buckby)

Concrete sleeper delivery, 29th September 2009. (Photo courtesy Richard Buckby)

Work continues on the northern pointwork of the passing loop, 30th September 2009. (Photo courtesy Richard Buckby)

Groundwork for the new line adjacent to the platform, 30th September 2009. (Photo courtesy Richard Buckby)

Formation of the passing loop trackbed, 30th September 2009. (Photo courtesy Richard Buckby)

Pointwork takes place for the headshunt, 30th September 2009. (Photo courtesy Richard Buckby)

Initial trackwork for the passing loop/headshunt with Duffield Tunnel in the background, 30th September 2009. (Photo courtesy Richard Buckby)

The northern junction of the passing loop takes shape, 7th October 2009. (Photo courtesy Richard Buckby)

Concrete sleeper laying. Duffield station can be seen in the background. 7th October 2009. (Photo courtesy Richard Buckby)

Class 20 No. D8001 at the head of the works train, 7th October 2009. (Photo courtesy Richard Buckby)

The loop progressses as a handful of spectators look on from the A6 road bridge, 7th October 2009. (Photo courtesy Richard Buckby)

Looking north from the A6 road bridge, 12th October 2009.