In short, the answer is: tradition. There is no standard.
In the World Cup, each component country in the United Kingdom has its own national team. England and Scotland are the two oldest powers in beautiful game And they have been rivals since the nineteenth century, before the existence of FIFA. For this reason, in the particular case of the World Cup, countries under Elizabeth 2ª preferred to continue playing separately, as in the old days.
In the Olympics, on the other hand, all regions associated with the British Crown in any way compete under the designation Great Britain – which is different from the United Kingdom. Great Britain is the name of the largest island in the archipelago, where there are three countries: England, Scotland and Wales. On the other hand, the name of the United Kingdom includes Northern Ireland, as it refers to the political unity between these four countries, and not to geography.
Briefly:
Great Britain: the island where Scotland, England and Wales are located.
United Kingdom: A country made up of four countries: England, Scotland, Wales and Northern Ireland.
The work is confusing because although competitors on uniforms and registration plates are identified as Great Britain (GRB), in practice they can come from many places that belong to the United Kingdom but are not on the island of Great Britain – this is the most common case. Obvious, of course, Northern Ireland. There are two other regions in a similar situation to Northern Ireland: the Isle of Man and the Channel Islands.
To make matters worse, some remote overseas territories such as the Falkland Islands and Gibraltar are not even considered part of the United Kingdom – not to mention Great Britain of course – but they are also in the works. The British Olympic Association (BOA) is responsible for all delegations.
The reason for this is historical. This federation has been going on since the first modern Olympic Games, which were held in 1896. Originally, only Great Britain competed, and today the GRB brand on uniforms and scoreboards is so well established that it was difficult to change. Moreover, the adoption of the United Kingdom on Great Britain would solve the problem of Northern Ireland and the smaller islands, but would ignore the Falklands and Gibraltar. In other words, it will be half a solution.
The House of Representatives itself has already stated: “Neither the United Kingdom nor Great Britain (…) will be representatives of all the Territories under the jurisdiction of the House of Representatives. While the BOA has always sought to recognize the valuable contribution of Territories which contribute to our Olympic success, the IOC has always recognized the team as a GRB since its inception in 1896.”
It is also good to remember that the union remains, under any name, because secession is not in anyone’s interest: alone, England will be lower than Russia in the medal standings, and the other territories will go to the bottom of the table.
If we separate from the unit we will not win: Where will Great Britain’s medals go at the 2016 Olympics if the confederations play separately:
103 – England;
16 – Scotland;
9 – Wales;
1 – Isle of Man;
1 – Channel Islands.