Ember Inns, which owns the Railway Hotel in Hornchurch in Essex, has said its food was prepared to the highest hygiene standards.
A spokesman told the London Evening Standard:
The local authority is investigating an alleged food poisoning outbreak at the Railway.
We are fully co-operating.
Until the investigation is complete we can’t speculate about a possible cause or source.
More top news
Experts say a trial into an early Ebola vaccine shows it is safe, but did not perform as well as had been hoped.
Frequent snowfall expected across much of the north this evening and strong northeasterly winds will make it feel noticeably cooler.
A Jewish leader was forced to escape from the camp through a window last night, when he was locked in during a TV broadcast.