89 London Underground owns a significant number of tunnels which are not
shown on Ordnance Survey mapping, and manages risk presented by nearby
development using a dedicated infrastructure protection team. LUL stated that it
manages risk by:
a. providing local planning authorities, neighbours, developers and others with
information on the location of surface and subsurface assets;
b. checking planning applications submitted to Local Planning Authorities, and
where necessary, either objecting or seeking modification;
c. responding to enquiries from Local Planning Authorities;
d. reviewing third party design and working methods; and
e. examining notices from utility companies.
90 The infrastructure protection team has issued Local Planning Authorities (London
Boroughs) with maps showing London Underground’s area of interest, 25 m
either side of the tunnel centrelines. It has asked the Local Planning Authorities
to advise it of any planning applications within these areas.
91 London Underground staff also walk the routes of tunnels at street level to look
for evidence of development work (eg demolition and site activity) which may not
have been identified by other processes. The streets above subsurface tunnels
(eg the Metropolitan, District and Circle Lines) are walked every four weeks, and
above deep tube routes every eight weeks.
