It's Sir Michael Hordern in an MR James ghost story called Whistle and I'll Come To You from 1967.
It was released on DVD by the BFI but I am not sure if it is still available. There's one for sale on amazon.co.uk but it's �30+, but there is also a VHS for about a tenner.
LINK: [ame="http://www.amazon.co.uk/s/ref=nb_ss_d_h_?url=search-alias%3Ddvd&field-keywords=whistle+and+i%27ll+come+to+you&x=16&y=20"]http://www.amazon.co.uk/s/ref=nb_ss_d_h_?url=search-alias%3Ddvd&field-keywords=whistle+and+i%27ll+come+to+you&x=16&y=20[/ame]
There is one being auctioned on ebay as we speak!