Mo Farah, Chris Froome, Bradley Wiggins, Justin Rose, Mike Catt, Mako Vunipola, Manu Tuilagi, Toby Faletau, John Barnes, Owen Hargreaves, Greg Rusedski and let's not even mention Cricketers.
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The name's you've listed here Primo are good examples of a template for nationality being impossible.

So, let's take Bradley Wiggins. You've included him because he was born in Belgium. Yet his parents were in Belgium as his dad was a professional cyclist. He was raised in St Helens, is clearly a Lancashire lad and is 100% British IMO. His Belgium link is about as relevant as my mate's Papua New Guinea link.

On the other hand Greg Rusedski. Now, I liked the bloke, but most people wouldn't consider him to be a British man. I mean, he just isn't. He's a Canadian with links to Britain that played under the British flag. As such I supported him. But, is he British like Wiggins? No.
For someone like Mo Farah, being a refugee at a young age, his nationality is mostly defined by his own self-identity. For him, he is British. For me, he's British. Somalian roots of course but he proudly represents his country. In fact, in 2012 when some wag questioned whether he should run for Somalia Mo was rightly outraged.
It's all a rich tapestry [/QUOTE]
Mate, I was just using @Beanz's criteria based on where they were born and trying to highlight how fucking stupid it is. Of course I don't believe Bradley Wiggins is Belgian.
in my opinion , every case has its own merits.