It remains true, whilst the UK is now an overall net gas importer (largely thanks to a lack of storage, though it would have been inevitable anyway in the coming years), we are also a gas exporter. In fact according to an article I read, the pipelines between the UK and the continent are
"primarily used for exporting gas".
European utility companies
do take advantage of our lower prices, because (unlike Russian exporters for example) our product is not priced relative to oil. But it remains a
fact that the gas that we do produce, is sold to the continent when domestic demand falls (usually during the summer months), and at a cheaper rate, simply because we lack the capacity to store it.
It is this very lack of capacity that prevents us from not only storing the gas we produce during the months when demand falls, but which also prevents us from buying cheaper gas during the summer months, meaning that we're then subjected to having to pay higher prices sourcing our gas from the continent during winter.
Now I wonder why that is?
It was reported on SKY News during the recent round of price hikes, UK storage as being somewhere in the region of 4% of annual consumption, or about 2 weeks worth, unlike France which apparently has 25% or somewhere in the region of 3 months (almost enough to cover winter). It's this lack of storage capacity that is also contributing to our higher gas bills.