Good point.
I think we need clarification on the time-period of this GB. I read "Defence of Britain / Atlantic" as actions in the immediate defence of the Briish Isles and the Atlantic and Western Approaches, with the 'Atlantic' portion including, for example, defence of shipping heading for Britain with cargoes on which the country depends.
Although I can see, to an extent, that the inclusion of "up to D-Day, including D-Day stripes" could involve defensive actions against British (and Allied) interests, and certainly against the V1's launched against Britain, where both ADGB and seconded 2 TAF units were involved in air defence from UK bases, as well as fighter-bomber, medium bomber, and heavy bomber strikes against the launch sites, it's still a little vague. Note, of course, that the first V1 fell on UK soil on 13th June, two weeks after D-Day, so that would make anti-Diver ops ineligible for the GB under its present title, and "up to D-Day" would exclude any operations, either over the UK or on the Continent, after June 6th.