A flagship BBC radio current affairs show had to be cancelled after guests including employment minister Chris Grayling were unable to get to the live recording because of a body on a railway line.
Radio 4's Any Questions was due to be broadcast from the National Railway Museum in Shildon, County Durham, but only one of the four-strong panel for the topical debate show was able to get there on time.
A police investigation followed by delays caused by signalling problems in the Grantham area are believed to have left producers with no choice but to abandon the programme.
Listeners were given an on-air apology and an archive programme was broadcast in its place while members of the live audience were said to have been given a free tour of the museum.
Liberal Democrat policy chief Richard Grayson was the sole guest to make it on time. Others who fell victim to the "travel problems" were Labour peer Lord Malloch-Brown and the chairman of Interbrand, Rita Clifton.
A Radio 4 spokesman said last night: "Due to unforeseen circumstances some panellists due to appear on Any Questions from Durham this evening were severely held up on their journey."
The cancellation means today's edition of Any Answers - in which listeners respond to what they have heard during the panel discussion - has also had to be cancelled.
British Transport Police were called to a level crossing in Biggleswade, Bedfordshire, after reports of a person being hit by a train. An individual was pronounced dead at scene and there were no suspicious circumstances.
Radio 4 said it hoped to return to the museum for a future edition of the show.