Colin wrote:
Just reported on the news channels. 20m of the tunnel being built
above the line at Gerrards Cross has collapsed moments after two
trains passed each other within the tunnel.

Pictures show the collapse is huge. The line will undoubtedly be
blocked for over a week at least.

Looks like it was extremely lucky that no-one was killed.

http://news.bbc.co.uk/2/hi/uk_news/e...ts/4639671.stm
refers.

Nexusalpha reckons that Chiltern services are completely suspended
between West Ruislip and Princes Risborough, with some services
diverted via the Met and others coachituted from Ruislip to Risborough.