In message , at 01:36:42 on Wed,
27 Apr 2011, Theo Markettos
remarked:
The nature trail isn't a part of the Cambridge-St Ives scheme.

Do you mean that the trackbed had never acquired the status of a nature
trail, so apart from cyclists there's no-one that worried about it
potentially disappearing?

It was still technically an operating railway until 2 August 2003, so it
wasn't officially available for walkers or cyclists.

Where was the official end of the line in 2003? The rails were lifted
beyond Fen Drayton, and the St Ives bypass was built on top of the St
Ives station site (apparently in 1980), the bypass uses the old trackbed
towards March.
--
Roland Perry