This outside broadcast was obviously going to be a wet one, necessitating waders!
The man in the photo is Radio Links Supervisor, Billy Horne. The van is either 15 or 126, both Bedford Links Vans. According to Brian, who took the photo, Billy had just bought the waders and was persuaded to try them on.
The photograph was originally shared on the Pebble Mill Engineers Facebook group.
Thanks to Malcolm Hickman for adding information about the photograph.