Right now, the UK is exporting energy to France because we are receiving Liquified Natural Gas at our Gas terminals and have nowhere to store it and can't send it over pipelines to Europe fast enough, so our only option is to burn it for electricity and sell that.

Once other EU LNG terminals come online, and as the UK needs more energy itself over winter, it stop exporting. Hopefully some more UK gas storage will come on line in the next few weeks as well, but probably not enough to make a significant difference to this winter's outlook: https://www.bloomberg.com/news/articles/2022-08-31/centrica-...