Every attempt to describe our national character makes at least some mention of ‘English reserve’, and many also puzzle over its apparent opposite, English loutishness, hooliganism and other anti-social behaviours. My only contribution has been to suggest that these seemingly contradictory Jekyll-and-Hyde tendencies are part of the same syndrome (a bit like the manic and depressive elements of what is now called bi-polar disorder). This diagnosis may be helpful in understanding the English, but identifying and naming a disorder tells us nothing about its cause.