Never been convinced about the "link to the M4" malarkey at CWL. BRS does ok, and the road to that is just dreadful - makes the current road to CWL look like a German autobahn.
I have a new theory about airports. Those folks on here who know who I am will know my lunatic travel - I go through a silly number of airports in a year. And you know what? I don't think I have EVER gone through one that didn't have building work going on somewhere. I think it is either a tax dodge ("pay council tax? No mate, not finished yet") or some bizarre IATA requirement