This rumour started off in the summer as "90 missing episodes found" and even some big name fans were taken in by it, but the BBC (and those in a position to know and/or find out) always rubbished it. The story seems to be this: in the summer, someone in Africa (probably an old TV company, but a private collector has also been mentioned) sent a large package of old TV material to a company in the UK. The shows were to be remastered from old, obsolete formats into something that could be played with modern technology, something that the company specialised it. Somehow this news got picked up by the Dr.Who fraternity who made 2+2=106. So, almost certainly its a case of "move along, nothing to see here."
At any rate, if Ethiopia has got anything, they never bought the broadcast rights to the Troughton era, so all we'd have to recover at best would be a handful of Hartnells, but still better than nothing.
BUT just suppose the rumour is true, could the BBC have kept it quote for all these months? Ostensibly yes. The two episodes found in 2011 were "found" in the summer but this was a well kept secret until "Missing Believed Wiped" at the British Film Institute in December. Even the programme said they would be showing "1960s BBC Science Fiction" with no mention as to what it was. No one had a clue until much closer to the event. And when "Tomb of the Cybermen" was found in 1991, the BBC put out a cover story that it was simply four episodes of an already existing story. The secret was apparently kept hidden for at least a few weeks; all other missing episode "finds" have been quite quickly reported.
Lastly, a little plug for my
own website about the missing episodes of Dr.Who.