You're right about the patriotism deficit in Labour. It crept in during Blair, and went on steroids during the Corbyn era when national pride or national identity was a dirty word if you were English. It'll take more than this to help Starmer, imo, particularly in view of his high profile stance on Remain and a second referendum. But I guess it's a start, and Boris Johnson's headless chicken organisational style of government will help him
He did it on St George's Day too. I'd expect there to be a constant trickle of patriotic stories linked to George's, rememberance, jubilee days etc etc. A big tide to turn as you say.