On the news just now...
Apparently gas consumption today would be 400M cubic metres, but there's only 350M cubic metres available, so a gas deficit has been declared. This means large industrial users will have their gas cut off for part of the day.
The two contributory factors are 1/3rd extra usage today over normal due to the weather, and two gas import docks broken down.
Centrica closed our North Sea gas storage last year, which held 9 weeks supply of gas, due ot it being not commercially viable anymore. Gas spot price currently 190p/therm.