Representatives from Caerphilly County Council told the committee that the lack of secure funding year on year is the main barrier to effective delivery of biodiversity action.

BBC: Sustainability committee

But the report had not mentioned any action to increase the effectiveness of the existing sound barrier.

BBC: Gloucester estate residents complain about M5 noise

We also agreed on an action plan to combat corruption, which in some countries is the single greatest barrier to economic progress.

WHITEHOUSE: G20 Summit Presidential Press Conference