Why is the UK still selling our gas cheaply to Europe when prices are going up so much at home?

When oil-related prices on the Continent tend to be higher, our European neighbours have been shopping with impunity for cheaper gas here in the UK through the interconnector.l Why is it still happening when supplies are dwindling and we’re having to import the stuff?

http://www.independent.co.uk/news/business/comment/jeremy-warner/jeremy-warners-outlook-britain-has-squandered-its-north-sea-inheritance-now-we-are-paying-the-price-843667.html

Yes this has been going on for some time now, and why? because our government is stupid. Can you think of a better reason?