A Labour MP who allegedly pestered a young female official to "come back to my hotel" after blocking her from getting into a taxi is not facing an investigation after the party said the incident was not sexual harassment.

Labour's ruling body, the National Executive Committee, failed to interview the woman after she submitted an official complaint or take evidence from another male MP who witnessed the incident.

The NEC subsequently claimed that there was "not sufficient prima facie evidence" to suggest that the event she described "was motivated by a protected characteristic."

The MP who witnessed the incident said he was "baffled" that he had not been asked to make a statement before a decision was made on whether to take the complaint forward.

The woman said that the decision not to investigate the incident had made her feel like "a victim all over again".

It will add to further scrutiny of Labour's handling of complaints of harassment and abuse in the wake of a series of high-profile cases.

The woman told The Daily Telegraph: "They've made me a victim all over again by not explaining their decision properly. This has left me worse than I felt before.

"There is no right to appeal a decision that is ambiguous, it isn't clear and they use legal jargon that means nothing.