Quaglino’s, a renowned London restaurant, has reopened having been closed following the death of a customer.

Denise Martin, a mother of two, dined at the Mayfair restaurant on Saturday night and died two days later after experiencing severe stomach cramps and vomiting.

A post mortem has failed to determine a cause of death.

The Mayfair restaurant voluntarily closed for two days while Environmental health officers from Westminster City Council and the Health Protection Agency carried out an investigation but reopened last night (Thursday).

A spokesman for the restaurant, which is owned by D&D, formerly named Conran Restaurants, said: ‘As part of that investigation they came to us and we voluntarily closed the restaurant on Tuesday and Wednesday before re-opening [on Thursday].

‘The results of the post mortem were inconclusive and there is nothing currently to link her death to Quaglino’s. However, we are continuing to fully co-operate with their investigation.’

In a statement, Richard Block, Westminster City Council’s operations manager for food, health and safety said: ‘There is nothing currently to link this death directly to the restaurant, which is cooperating fully with our investigation.’

Ms Martin was celebrating her 50th birthday at the top restaurant with five friends, three of whom also became sick.

Quaglino’s was founded by Giovanni Quaglino in 1929 and was re-launched by Terence Conran in 1991 when it went on to become a regular haunt for celebrities and affluent city bankers.

Written by Suzannah Ramsdale