Prince Phillip was reportedly admitted for heart tests as he continued to battle a raging infection.Concerns have been raised for the 99-year-old Duke of Edinburgh as medical experts have said he could remain in hospital for up to six weeks to be treated.Philip was transferred to the St Bartholomew’s by ambulance today after spending over a week in the private King Edward VII hospital in Central London.As the Duke got ready to make the journey to Britain’s oldest hospital, staff held up