The Hellenic Broadcasting Corporation (ERT), that is the Greek state-owned public radio and television broadcasting corporation, has decided to digitize its archive and make it available online.
I have collected here some material (mostly newsreel excerpts) pertaining to Anglo-Greek relations and is already online:
Roy Hattersley (person in charge of renegotiating the terms of the UK's membership of the EEC) was the first British minister to visit Greece since the restoration of democracy.
You can watch a video of his arrival here.
He stated that he went to Athens to help improve relations with Greece, and discuss issues of common concern, such as the situation in Cyprus and Greece's application of the EEC (two weeks before the UK held its European Communities membership referendum - by the way, here's a historian's view of what would have happened if Britain had voted 'no').
The following day Hattersley talked to the press about the nature and the atmosphere of the discussions he had with Foreign Minister Bitsios. You can watch that here.