European low-cost airline Ryanair on Friday rejected allegations about safety and other issues by two undercover television reporters who filmed secretly while posing as cabin crew at the carrier's main London base.
Britain's Channel 4 television station is due to air the documentary on Monday, which features secret footage taken over five months while the reporters trained and worked as cabin crew at London Stansted Airport.
Ryanair published correspondence on its web site on Friday from the Dispatches program that outlined allegations by the documentary about safety, security and staff training.
Channel 4 said it stood by the allegations.
"We absolutely stand by everything that's in the program. It is based on five months worth of undercover work. All our allegations are on film," a Channel 4 spokesman said.
Ryanair rejected the allegations, which it said had been passed onto aviation regulatory authorities who also dismissed the claims.
"Ryanair operates to the highest European standards of safety and security," Chief Executive Michael O'Leary said in a statement.
Ryanair has shown increasing concern about potential negative publicity from the program since details emerged this week in British newspapers and on television trailers for the documentary.
Dublin-based Ryanair, well known for its aggressive price-cutting and no-frills service, has offset rising fuel prices with cost cuts as it expands rapidly in Europe.