<Tr> <Th> 0151 </Th> <Td> Liverpool </Td> <Td> formerly 051 (5 = L) </Td> </Tr> <Tr> <Th> 0161 </Th> <Td> Manchester </Td> <Td> formerly 061 (6 = M) </Td> </Tr> <Tr> <Th> 0171 </Th> <Td_colspan="2"> Used for Inner London from 1990 until 2000 </Td> </Tr> <Tr> <Th> 0181 </Th> <Td_colspan="2"> Used for Outer London from 1990 until 2000 </Td> </Tr>

How many digits in a uk vat number