<Tr> <Td> Soap opera </Td> <Td> Crossroads </Td> <Td> 1964--1988, 2001--2003 </Td> <Td> 26 </Td> </Tr> <Tr> <Td> Children's show </Td> <Td> Play School </Td> <Td> 1964 - 1988 </Td> <Td> 24 </Td> </Tr> <Tr> <Td> Game Show </Td> <Td> Play Your Cards Right </Td> <Td> 1980 - 2003 </Td> <Td> 23 </Td> </Tr> <Tr> <Td> Sitcom </Td> <Td> Only Fools and Horses </Td> <Td> 1981--2003 </Td> <Td> 22 </Td> </Tr>

What is the longest running soap opera in uk