UK floods: 'Delays for weeks, if not months'
11 February 2014 Last updated at 17:15 GMT
Water flowing out of the swollen Thames has flooded the railway on the Windsor line into London, where it passes through Datchet.
The presence of an electrified rail means that even when the water subsides, engineers face "weeks, if not months" of work to assess and repair the damage.
Richard Westcott reports.