so much of the lands delineated on the deposited plans and described in the deposited book of reference as they may require for the purposes of the authorised works or for any purpose connected with, or ancillary to, their undertaking; and

so much of any land specified in columns (2) and (3) of Schedule 7 to this Act shown on the deposited plans within limits of land to be acquired or used as they may require for the purpose specified in relation to that land in column (1) of that Schedule.