Actor John Field prepares for his performance as Santa Claus on a City Cruises boat on the River Thames in London, Britain. Photos by Reuters : Santa says leap of faith is part of Christmas magic

Actor John Field poses for a photograph as he gets dressed as Santa Claus at a Christmas grotto in London. : Santa says leap of faith is part of Christmas magic

Two-year-old Elijah Pham presents his wishes to actor John Field, dressed as Santa Claus, at a Christmas grotto at the Wetland Centre in London. : Santa says leap of faith is part of Christmas magic

Actor John Field, dressed as Santa Claus, reads a Christmas wish list at the Wetland Centre in London. : Santa says leap of faith is part of Christmas magic