More concerning is what hygiene inspectors also found - unclean buildings and facilities and not enough ventilation, hand washing facilities and pest control to enable good food hygiene. The zero star rating followed an inspection carried out on September 12 this year. the FSA said: "Hygienic handling of food including preparation, cooking, re-heating, cooling and storage require urgent improvement. Cleanliness and condition of facilities and building (including having appropriate layout, ventilation, hand washing facilities and pest control) to enable good food hygiene, requires urgent improvement.

"System or checks in place to ensure that food sold or served is safe to eat, evidence that staff know about food safety, and the food safety officer has confidence that standards will be maintained in future requires urgent improvement. We have asked the Hustyns Resort to explain what happened and to tell us what the hotel has done to overhaul its hygiene system and ensure that the next inspection delivers a five-star rating.

A spokesperson said: "The management of Hustyns Resort acknowledge the result of an EHO inspection last month. All shortcomings were addressed within a matter of days and EHO are satisfied that we can continue service from our kitchen. We continue to make improvements and will issue a more detailed statement in due course. "

The hotel which boasts its own 27 acres of land and extensive facilities including two conference and banqueting suites, a restaurant and brasserie with bar and 37 spacious en-suite letting bedrooms, a 20m pool, gym and spa and treatment rooms, also features a nuclear bunker dating back to the Second World War.

The underground facility, nicknamed the 'nuclear bunker' is located beneath the hotel and is a secure concrete bunker with 12 bunk beds, shower, chemical toilets, kitchen and air filtration system. While the hotel has been on the market for at least a year, Hustyns said it keeps receiving inquiries from holidaymakers wanting to stay in there. So much so that it is considering offering the facility to future guests.

The hotel's website reads: "Due to the high rate of enquiries into renting permanent spaces in our nuclear bunker, we are actively discussing this. Stay tuned for whether you can have your own guaranteed space in our nuclear bunker."

From its early days, Hustyns was rumoured to have hosted a range of celebrities with patrons flying in and out of the site via helicopter. According to People magazine, in 2004 Demi Moore and then-husband Ashton Kutcher, along with Moore's three daughters, Rumer, Scout and Tallulah stayed at the resort.