The businessman Duncan Bannatyne was rushed to hospital with a suspected heart attack - but sent a message to his followers on Twitter telling them he hoped to be discharged soon.
Earlier, his daughter Abi had used the same website to confirm that he had been taken into hospital.
The businessman's company, based in Darlington, released a statement thanking medical staff who attended to him.
“Everyone at the company is very concerned and upset, but we know that Duncan is a very strong person and we are confident he will make a full recovery. Everyone wishes him well. We’d like to thank the quick and professional actions of the paramedics who attended to Duncan and thank the staff at the Memorial Hospital for his on-going care.”