"Dominic" wrote

For info, I believe the application under discussion can be found on
London Borough of Hillingdon's planning webpage by searching for
planning application reference 66712/APP/2010/103
http://www.hillingdon.gov.uk/index.jsp?articleid=10058
Its location is Northolt Junction Civic Way Ruislip and it proposes
"Track and junction improvements involving widening the existing up
line embankment for 1.2km; stabilising the existing embankment; laying
a second track South of existing up main line; provision of new
junctions; replacing the existing single track bridge over Civic Way
with a double track bridge; infilling redundant under bridge and
ancillary works."
Documents including a planning statement and plans are included with
the application.

Traditionally such work would have been authorised by a Private Act of
Parliament. This procedure has been superseded by the Transport and Works
Act, but is still a slow process, more appropriate for more major work, such
as the Thameslink Project. Local authority planning permission should be
much quicker. One piece of railway which was authorised by local authority
planning permission was the Penmanshiel diversion following the tunnel
collapse.

Peter
Cross-posted to uk.transport.london.
Kind regards, Dominic