After the final whistle Northern Ireland coach Bob Ramsey said the scoreline was not a true representation of the game.

BBC: Northern Ireland Under-18s beat Guernsey Under-19s 6-0

The Historical Association told the BBC the reference to King John was not in its lesson plan but in an article it had published, in which the point was to show pupils that film depictions of historical figures "may not be a true representation of the past".

BBC: Gove criticises 'Mr Men' history teaching

As long as the survey group is a true statistical representation of the country -- in terms of race and gender, for example -- even a small pool of respondents can yield results that are accurate for the whole country.

CNN: To a pollster, less is more