This with thanks to @13MilePost...
Good to see London Underground sending the Metropolitan line A stock off in style today.
Here Howard Collins, LUL's Chief Operating Officer, stands next to the last A60 stock at Harrow on the Hill.
The Cravens built trains entered service on the Met on the 12th June 1961 - over fifty years ago. They have been displaced by Bombardier built S stock.
Below the Metropolitan line's General Manager (holding the commemorative headboard) stands in front of a set of the new S stock at Amersham.
So 'Back to the future'... ahem... in more ways than one!