William and Kate join Sir David Attenborough as ship named after naturalist

The Duke and Duchess of Cambridge have joined Sir David Attenborough for the official naming of a polar research ship the public voted to call Boaty McBoatface.

The ship was officially named the RRS Sir David Attenborough, chosen after the public selection was vetoed, at a ceremony at the Cammell Laird shipyard in Birkenhead, Merseyside, on Thursday.