2.  A national or citizen of one or more of the countries or territories specified in the Schedule to this Order who on arrival in the United Kingdom passes through to another country or territory without entering the United Kingdom shall hold a visa for that purpose (a transit visa) unless he:

(a)has the right of abode in the United Kingdom under the Immigration Act 1971(1); or

(b)is also a national of a member State of the European Communities.