Africa recently got its first so-called unicorn, a privately owned tech start-up which is valued at more than a billion dollars, in the shape of e-commerce company the Africa Internet Group, which has a presence in 26 countries across the continent.

So where will the next unicorn come from? Many would guess from established tech centres like Nairobi, Cape Town or Lagos. But what about Buea - a small town in south-west Cameroon?

The BBC's Tamasin Ford finds reports for Africa Business Report on why some are tipping the town for great things.