Network Rail will complete the work over Easter 2013 on Middlegreen Road bridge and Trenches bridge in Slough as well as Old Stockley Road bridge and Horton bridge in Hillingdon, west London.

BBC: Crossrail bridges in Slough and Hillingdon to be replaced

As well as Mr Ball, the other men indicted are Dustin Heard, Evan Liberty, Nick Slatten and Paul Slough.

BBC: Blackwater guards 'used grenades'