noting all of the non messages and past sell by date messages mentioned, What annoys me is the huge structures they use.
The vast majority of them are on huge pillars, they then reach across the highway. As they are s large thepillars have to be as close to the highway as possible. So they have to build crash barriers to avoid any car hitting them, and simply deflect some unlucky s*d back into the road to be hit by the following traffic.
They look enourmously expensive to me. Designed by a commitee

why didnt they just pin them to the bridges and various other gangways they already have across the Motorways ?? Attach them to direction signs, or to lamposts in sets of three to deliver the message..
or is that to simple and to cheap , I must look out for new entrants to the rich 500 list. and see if they work for the DFT

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rgds
bill