BRITISH transport secretary Lord Andrew Adonis has announced plans for the country's first major electrification project for more than two decades. Planning will start immediately on the electrification of the Great Western Main Line (GWML) from London to Bristol, Cardiff and Swansea, together with the lines from Reading to Newbury and Didcot to Oxford. The £1 billion project will be implemented in phases, with the final section due for completion in 2017, when London - Swansea journey times will be reduced by 19 minutes.