Work has begun on a £50m track redoubling project on the Cotswold rail line in the UK.

Under the first phase, ground for the additional track between Oxford and Worcester will be prepared in order for tracks to be laid in 2010. Nearly 10 miles of existing track will also be repositioned.

Nearly 21 miles of concrete new surface cable route will be built, 30 miles of new cable will be installed and 60 sets of signal equipment will be relocated.

The work includes adding tracks through the old Chipping Camden/Mickleton tunnel.

The track doubling is aimed at reducing congestion along the route and accommodate the increasing number of passengers.

The project is expected to be completed by early 2011.