clerical workincludes writing, book-keeping, typing, filing, duplicating, sorting papers or information or calculating (whether by manual, mechanical or electronic means), drawing, and the editorial preparation of matter for publication;
heavy maintenance servicesmeans the carrying out on locomotives and other rolling stock of maintenance services (including the detection and rectification of faults) other than light maintenance services (within the meaning given by section 82 of the 1993 Act);
inland waterwaymeans any such waterway, whether natural or artificial.
licence exempt operatorhas the meaning given in section 10(6) of the 1993 Act;
licence holderhas the meaning given in section 83(1) of the 1993 Act;
office premisesmeans any hereditament constructed or adapted as offices or for office purposes, or used wholly or mainly for such purposes;
office purposesincludes the purposes of administration and clerical work and handling money;
railway serviceshas the meaning given in section 82(1) of the 1993 Act.
the Boardmeans the British Railways Board;