Britishness as a prize, not an inherent part of identity. Many non-native ethnics see it this way, and they're backed up by those in the political class, the media class, the lanyard class, etc etc.
Ben OJ does it here, implying that he's actually more British than Richard because he's served in the military. I'm not aware of the details of Ben's service, but I'm willing to thank him for it - it takes an amount of courage and discipline that few have nowadays, and we're all benefitting from those who risk themselves to do it. But it has nothing to do with nationality or ethnicity. Why would it? You could describe the most indisputably noble, courageous, selfless person alive and there'd be no way to know that person's race, ethnicity or nationality.
We saw the same with Allison Pearson talking about Bukayo Saka. "He was a great student and a brilliant footballer - what more does he have to do to convince you he's British?" As if these facts are at all related.
The sinister undertone is that Britishness and Englishness are actually just rewards in their entirety. That one cannot be born into these things, they have to be earned through character and accomplishment - and there are billions around the planet competing with you for them. Many millions, by sheer force of numbers, will score higher than you will.
So, Mr Ethnically Vanilla, what are you going to achieve to earn your Britishness?