Hallo guten Tag, i have a German Blue passport, and Aufenthalt for 3 years , actually I am going to celebrate my new year in Barcelona spain , in My return flight from Barcelona to Frankfurt i habe 14 hours stay in London , so should I take a transit visa from embassy or not , as I read from ***.gov.uk that it’s depends on immigration officers that he may allow you to enter in London to visit some hours .., as I have my own business in Germany, so what do u recommend..? Should I bring my bussiness documents with me or something else ...??