Somehow I doubt it'll be mentioned again. The main gripe with the plucky few restaurants that attempt 'pavement dining' is that they end up blocking the pavement (British pavements generally being barely wide enough for two people to comfortably walk abreast). Which is a minor annoyance for most people, who can hop on the road or squeeze past, but for the elderly it can be outright dangerous, especially for those with mobility scooters. And which is the last demographic to consistently vote Tory nowadays...?
For places that are pedestrianised and have the space (though I suspect pedestrianisation is considered 'woke', if not a downright conspiracy theory, by the right these days), most lunch restaurants do already have outside dining when weather permits.