Probably doesnt really understand what all the fuss us about. He had a lengthy photo opportunity there. Then left for another one. Simples. 
Added to the fact the Tory election broadcast the other night had the Union flag flying upside down, it shows the days of the Tories being genuine patriots are long gone.
As a side note - We sent the best we had to French beaches 80 years ago.
Look what the French are sending to our beaches now. 
I think I've figured Sunak out. He was/is constantly being criticised by a certain group within his own party, with rumours of a no confidence vote being mooted almost weekly. He's probably thought "I don't need this, I've tried my best, you miserable bunch of tossers. I'm going to call a general election, that'll shut you all up, then I'm deliberately going to try and lose it. Then I'm off to a very well paid job in the USA, while you bunch of old women will all lose your seats, and your jobs. Up yours,"