<Tr> <Td> 2014 </Td> <Td> Western Warhorse </Td> <Td> 6 </Td> <Td> Tom Scudamore </Td> <Td> David Pipe </Td> </Tr> <Tr> <Td> 2015 </Td> <Td> Un de Sceaux </Td> <Td> 7 </Td> <Td> Ruby Walsh </Td> <Td> Willie Mullins </Td> </Tr> <Tr> <Td> 2016 </Td> <Td> Douvan </Td> <Td> 6 </Td> <Td> Ruby Walsh </Td> <Td> Willie Mullins </Td> </Tr> <Tr> <Td> 2017 </Td> <Td> Altior </Td> <Td> 7 </Td> <Td> Nico de Boinville </Td> <Td> Nicky Henderson </Td> </Tr>

Who won the 2016 racing post arkle trophy trial chase