LONDON, Dec 14 (Reuters) - Britain reported 59,610 new COVID-19 cases on Tuesday, the highest figure since early January, as it faces what Prime Minister Boris Johnson has called a "tidal wave" on infections from the Omicron variant, official data showed. The number of new infections is the fifth highest recorded since the outbreak of the pandemic in March last year. The figures also showed there had been 150 deaths within 28 days of a positive test. The number of patients being admitted to hospital between Dec. 4 and 10 was also up 10% compared with the previous seven days, with 5,925 people being hospitalised.