In this Part of this Schedule—

• “alternative apparatus” means appropriate alternative apparatus to the satisfaction of National Grid to enable National Grid to fulfil its statutory functions in a manner no less efficient than previously;

• “apparatus” means—

  1. a

     in the case of an electricity undertaker, electric lines or electrical plant as defined in the F1Electricity Act 1989 belonging to or maintained by that undertaker;

  2. b

     in the case of a gas undertaker, any mains, pipes or other apparatus belonging to or maintained by a gas transporter for the purposes of gas supply,

  together with any replacement apparatus and such other apparatus constructed pursuant to the Order that becomes operational apparatus of National Grid for the purposes of transmission, distribution and/or supply and includes any structure in which apparatus is or will be lodged or which gives or will give access to apparatus;

• “authorised development” has the same meaning as in article 2 (interpretation) of this Order and includes any associated development authorised by the Order and (unless otherwise specified) for the purposes of this Part of this Schedule includes the use and maintenance of the authorised development and construction of any works authorised by this Schedule;

• “commence” has the same meaning as in article 2 (interpretation) of the Order and commencement is to be construed to have the same meaning save that for the purposes of this Part only the F2terms commence and commencement include any below ground surveys, monitoring or operations or receipt and erection of construction plant and equipment within 15 metres of any apparatus;

• “deed of consent” means a deed of consent, crossing agreement, deed of variation or new deed of grant agreed between the parties acting reasonably in order to vary and/or replace existing easements, agreements, enactments and other such interests so as to secure land rights and interests as are necessary to carry out, maintain, operate and use the apparatus in a manner consistent with the terms of this Part of this Schedule;

• “functions” includes powers and duties;

• “ground mitigation scheme” means a scheme approved by National Grid (such approval not to be unreasonably withheld or delayed) setting out the necessary mitigation measures (if any) for a ground subsidence event;

• “ground monitoring scheme” means a scheme for monitoring ground subsidence which sets out the apparatus which is to be subject to such monitoring, the extent of land to be monitored, the manner in which ground levels are to be monitored, the timescales of any monitoring activities and the extent of ground subsidence which, if exceeded, will require the undertaker to submit for National Grid's approval a ground mitigation scheme;

• “ground subsidence event” means any ground subsidence identified by the monitoring activities set out in the ground monitoring scheme that has exceeded the level described in the ground monitoring scheme as requiring a ground mitigation scheme;

• “in” in a context referring to apparatus or alternative apparatus in land includes a reference to apparatus or alternative apparatus under, over, across, along or upon such land;

• “maintain” and “maintenance” shall include the ability and right to do any of the following in relation to any apparatus or alternative apparatus of the undertaker including construct, use, repair, alter, inspect, renew or remove the apparatus;

• “plan” or “plans” include all designs, drawings, specifications, method statements, soil reports, programmes, calculations, risk assessments and other documents that are reasonably necessary properly and sufficiently to describe and assess the works to be executed;

• “National Grid” means—

  1. a

     National Grid Electricity Transmission plc (company number 2366977) whose registered office is at 1-3 Strand, London WC2N 5EH; and

  2. b

     National Grid Gas plc (company number 200600) whose registered office is at 1-3 Strand, London WC2N 5EH,

  as the context requires; and

• “specified works” means any of the authorised development or activities undertaken in association with the authorised development which—

  1. a

     will or may be situated over, or within 15 metres measured in any direction of any apparatus the removal of which has not been required by the undertaker under paragraph 23(2) or otherwise;

  2. b

     may in any way adversely affect any apparatus the removal of which has not been required by the undertaker under paragraph 23(2) or otherwise; and/or

  3. c

     includes in relation to gas apparatus any of the activities that are referred to in paragraph 8 of T/SP/SSW/22 (National Grid's policies for safe working in proximity to gas apparatus “Specification for safe working in the vicinity of National Grid, High pressure Gas pipelines and associated installation requirements for third parties T/SP/SSW/22”.