In this Act, unless the context otherwise requires, words and expressions to which meanings are assigned by the enactments incorporated herewith have in relation to the related subject-matter the same respective meanings; and

• “the Act of 1845” means the [1845 c. 20] Railways Clauses Consolidation Act 1845;

• “the Act of 1965” means the [1965 c. 56.] Compulsory Purchase Act 1965;

• “the appropriate authority” means—

  1. a

     in relation to the Company’s works and in relation to any land in respect of which powers for compulsory purchase are conferred upon the Company by this Act, the Company;

  2. b

     in relation to the Board’s works and in relation to any land in respect of which powers for compulsory purchase are conferred upon the Board by this Act, the Board;

• “the Board” means the British Railways Board;

• “the Board’s works” means Works Nos. 6 to 13 and any works, apparatus or conveniences constructed or provided by the Board as part of, or in connection with, or for the purposes of, those works or any of them;

• “the Company” means Heathrow Airport Limited and includes any subsidiary (within the meaning of section 736 of the [1985 c. 6.] Companies Act 1985) of the Company;

• “the Company’s works” means Works Nos. 1A to 5, the railway stations referred to in section 7 of this Act and any works, apparatus or conveniences constructed or provided by the Company as part of, or in connection with, or for the purposes of, those works or any of them;

• “constructed in tunnel” means constructed in tunnel in such manner as does not necessitate the cutting through or the removal of the surface soil;

• “the limits of deviation” means the limits of deviation shown on the deposited plans;

• “the tribunal” means the Lands Tribunal;

• “the underground railways” means such portions of Works Nos. 2A to 5, and any necessary works and conveniences connected therewith, as are constructed in tunnel; and

• “the works” means the works authorised by this Act.

All directions, distances and lengths stated in any description of works, powers or lands shall be construed as if the words “or thereabouts” were inserted after each such direction and length and distances between points on a railway shall be taken to be measured along the railway.

References in this Act to points identified by letters with numbers shall be construed as references to the points so marked on the deposited plans.

Unless the context otherwise requires, any reference in this Act to a work identified by the number of such work shall be construed as a reference to the work of that number authorised by this Act.