asked Her Majesty's Government:

Whether the powers of Network Rail to remove trees or other potential obstructions to railway lines extend beyond the boundaries of the railway or whether it is the responsibility of the relevant landowner to remove such obstructions. [HL2509]

This is an operational matter for Network Rail, as the owner and operator of the national rail network. The noble Lord should contact Network Rail's chief executive at the following address for a response to his question: John Armitt, Chief Executive, Network Rail, 40 Melton Street, London, NW1 2EE.