Civil Aviation Act 1949

1 Where it is alleged by any person interested that a foreign aircraft, which is not an aircraft to which section fifty-three of this Act applies, and which is making a passage through or over the United Kingdom, infringes in itself or in any part of it any invention, design or model which is entitled to protection in the United Kingdom, it shall be lawful, subject to and in accordance with rules of court, to detain the aircraft until the owner thereof deposits or secures in respect of the alleged infringement a sum (in this Schedule .referred to as " the deposited sum ") and thereupon the aircraft shall not, during the continuance or in the course of the passage be subject to any hen, arrest, detention or prohibition, whether by order of a court or otherwise, in respect or on account of the alleged infringement.