"..will people start importing bricks - or do transport costs kill it?.."
I am decades out of touch now, but used to buy bricks from Holland and Belgium in the 1970s (sometimes just to trade for better ones that we actually wanted). Some of those had already been bought in from further east. I guess the costings have shifted around a lot since then.
Felix - I didn't realise that was the case with gas prices. I see local authorities and the like making hedging arrangements for fuel costs, but I guess that's more to do with just ironing out single-season volatility.