Wind and solar have already reduced the reliance on foreign gas imports in recent years, experts said, as Labour’s clean power push ramps up.
Whitbread saw a 2% dip in quarterly sales amid a £500 million revamp of its estate of restaurants across the UK.
National Gas said Britain is ‘well placed’ to respond to winter demand.
The yield on 10-year gilts reached highs on Friday that were just below the post-2008 peak seen earlier in the week.