The Foreign and Commonwealth Office advise against 'all travel' or 'all but essential travel' to a particular place if we consider the risk to British nationals is unacceptably high. In the case of terrorism we advise against travel in situations of extreme and imminent danger, where the threat is sufficiently specific, large-scale or endemic to affect British nationals severely. Prior to 2001 our records are in an archive and not immediately available, but in 2001 we advised against 'all travel' to parts of Somalia; as well as against 'all travel' to Afghanistan and the Democratic Republic of Congo. Advice against 'all travel' to parts of these countries has been in place ever since, though the specific areas to which this has applied have changed many times. We keep all of our advice, including the areas where we advise against travel, under constant review.