Mr Giggs thinks its not acceptable

[Berserker]

This would be a perfect time to whip out "Rule Britannia", ya know, as in Prydain Fawr or Breatainn Mhòr!

That would be fine for the Welsh, Scottish and Northern Irish but, strictly speaking, the English aren't actually ethnically "Britons" except for inhabiting the island of that name. 

I personally think I have some Viking origins

[Holders]

This would be a perfect time to whip out "Rule Britannia", ya know, as in Prydain Fawr or Breatainn Mhòr!

That would be fine for the Welsh, Scottish and Northern Irish but, strictly speaking, the English aren't actually ethnically "Britons" except for inhabiting the island of that name. 

I personally think I have some Viking origins

With a name like Berserker, I would hope you have!