Multinational hotels giant Marriott International has turned to Freshfields Bruckhaus Deringer and Crowell & Moring to contest a potential fine of nearly £100 million ($125 million) following a data breach last year.

On Tuesday, the Information Commissioner’s Office (ICO) issued a notice of its intention to fine the company £99.2 million ($122.4 million) under the General Data Protection Regulation. It follows cyber breaches in November last year, which resulted in the exposure of personal data in about 339 million guest records – including those of seven million U.K. residents.