Wow this quiz ran and ran. Thank you to everyone who joined in. Our final thought comes from Barry:
What about 'Gridlock'? I believe that there is some rousing singing of both 'The Old Rugged Cross' and 'Abide with Me'.
The final (?) list is:
The Dalek Master Plan - Carol singing
The Chase - (thanks Gary Ward)
The Gunfighters - The Ballad!