It's a 'state of mind' not a title anyone uses, unless they intend winding up those who know the cap fits their state of mind.
You know the kind of thing: 'world beating', 'punching above our weight', 'a seat at the table', 'buccaneering', etc. - they are all terms that hark back to empire and colonialism.
Some people in the UK are determined to march into the future facing backwards, instead of allowing who we are today - ALL OF US - and looking to see what we can be when we do COLLECTIVELY, with allowance for differences and compromise, work towards being the kind of society that MOST of us want to be a part of.