Paul Corfield, well known contributor to several transport forums and groups for many years, including here as plcd1, has died. He was a manager at London Underground and was heavily involved in ticket gates and the early days of Oyster.
There is a discussion on his Flickr page
https://www.flickr.com/photos/24759744@N02/48133431628/
There is a discussion on his Flickr page
https://www.flickr.com/photos/24759744@N02/48133431628/