Mr Hammond said the Hindead Tunnel was one of the missing links in Britain's trunk road network.

BBC: Hindhead Tunnel

As the bridges are part of the motorway and trunk road network, this would be the responsibility of the Welsh government.

BBC: Concern over Briton Ferry M4 and A48 bridge fall deaths

For instance, it provides asphalt and road surfacing services for the Highways Agency trunk road network and it picks up rubble from demolition jobs.

BBC: UK economy: Two views of the recession