Reasons why they happened to be in Afghanistan are given in the various stories. They sound quite convincing to me, and eventually it appears they sounded convincing to their captors. And the British police apparently didn't need long to accept the stories.

Moreover, regardless of whether being on the wrong side of a border when countries on the other side of the world decide to invade a country is a valid reason to detain civilians for more than a few hours at most, there is the question of the conditions under which which they were detained.

Nazi prisoners weren't treated as badly as this, even at the end of the war, not by the US and the UK anyway, if what has been reported by a range of people is true; and indeed what little we have been allowed to see is consistent with these stories by these young men.

It is important that the truth about these allegations is properly investigated, and that can't be done by agents of the people responsible for the running or supervision of Guanatanamo Bay, because they are the ones in the dock.