The Motor Vehicles (Variation of Speed Limit) Regulations 1950
(b) declarations (i) that the applicant intends only to make a temporary stay in the United Kingdom; and (ii) that he has held no International Circulation Permit during the twelve months preceding the date of the landing of the vehicle in Great Britain except as specified in the declaration; (c) an undertaking to surrender the International Circulation Permit applied for to the appropriate authority on or before its expiry or earlier if the vehicle to which it relates is about to be removed ...