Designed in association with the RNIB , this watch is accurate to 1 second in a million years. metropolitan police. locations across london , central london . £ 27,034 to £ 33,315 , plus shift allowance , plus location allowance of £ 1,790 or £ 3,294. east london nhs foundation trust. east london. unspecified. south london and maudsley nhs trust. south london and maudsley .