What you are looking for I think is "Ancient Monuments 1 & 2" from the Public Announcement Film Unit.
I remember them well and Ive been searching for a copy since the early days of the internet - to no avail I'm afraid.
They were short films of about 7 mins in length, each made up of shorter clips of a couple of minutes each, detailing a different castle or abbey. They had quite wacky photography, muted colours, lots of pans with fisheye lenses and zooming in and out of battlements. All I think with slightly medieval music, battle cries and a voiceover telling you all about the location, voiced by someone a bit like the guy who did Protect and Survive!
They used to show them between programmes, maybe on a saturday morning or before kids tv started in the afternoon? They stopped showing them in the early 80s as I remember.
ANCIENT MONUMENTS 1
Public Announcement Film Unit
Duration: 7 minutes
First showing: 7th November 1968
A selection of shorts pieced together focusing on Ancient Monuments around the British Isles:
Conway Castle in North Wales
Rievaulx & Fountains Abbey in North Yorkshire
Framlingham Castle in Suffolk
ANCIENT MONUMENTS 2
Public Announcement Film Unit
Duration: 12 minutes
First showing: 30th October 1972
A further selection of shorts pieced together showing Ancient Sites around the British Isles:
Netley Abbey in Hampshire
Caerphilly Castle in South Wales
Furness Abbey in Cumbria
Mount Grace Priory in North Yorkshire
Castle Acre Priory in Norfolk
heres a page about the corporation that made the films:
http://www.testcardcircle.org.uk/ttcf.htmlSadly I've never been able to find hide nor hair of them, well, apart from an old dead torrent on kickass torrents. Looks like no one has ever uploaded either of these films to youtube or vimeo or anywhere..
Theres a guy on this forum that claims to have a copy but I've never bothered to follow it up!
http://www.britmovie.co.uk/forums/looking-video-dvd-tv/114956-public-information-film-corfe-castle.htmlanyway, good luck! If you ever do find them please let me know!
:-)