They also say the bugs infested their luggage, which led to further problems in their apartment when they returned home. Mrs Bluming claims the trauma was made worse as she is recovering from cancer and her immune system is still weak.
Their lawyer, Michael Weinstein, said they were forced to fumigate their home and throw away clothing, bedding, luggage and personal effects. Mr Weinstein added: "People associate bed bugs with more of a lower end class of hotel. Clearly, that is not the case here. The Mandarin is as premier and luxurious as any hotel could make themselves out to be."
Jill Kluge, communications director for the Mandarin Oriental Hotel Group, said: "We can confirm a regrettable, but isolated, incident of infestation occurred in May 2006 within one guest room at our London property.
"On discovery, a full investigation was carried out and the problem fully rectified. There have been no subsequent incidents. The matter has been referred to our insurers.
"Mandarin Oriental's policy is to operate with the highest standards of conduct, with stringent hygiene systems and processes in place at all of our hotels to safeguard the health and safety of our guests."
The hotel chain is accused of fraud, negligence, recklessness, intentional infliction of emotional distress deceptive trade practice and nuisance.