The company said Manny Fontenla-Novoa is stepping down with immediate effect.

The company has issued three profit warnings in the last year and is struggling to improve its UK business.

Fontenla-Novoa became chief executive in 2007.

His deputy Sam Weihagen will take charge until a permanent replacement is found.

Thomas Cook said in a statement accompanying news of Fontenla-Novoa’s resignation that it expects to meet its full year operating profit forecasts of 320 million pounds ($524 million), the targets mentioned in its last warning.