From The BBC:
Some 599,000 Premium Bond prizes remain unclaimed with a total value of more than £35m, according to National Savings and Investments (NS&I).The number – which has risen by 50,000 in six months – includes two prizes of £100,000, the savings group said. London residents hold the biggest proportion of the unclaimed tax-free prizes, which start at £25. Winners are sent cheques to the address held on file by NS&I, and prizes often go unclaimed because people move house. Others who fail to update details are members of the family of Premium Bond holders who have died. Prize fundThere is no time limit for claiming prizes, and details of winning numbers are available on the NS&I website or by writing to the organisers. Nearly £7m of prizes are unclaimed among London Bond holders, with another £4.7m unclaimed in the South East of England, and £2.9m in the North West of England. Just £817,175 has been unclaimed in the North East of England….