Meet one of Spain's dwindling knife sharpeners

We often take a look at new developments, new trends and the very latest technologies, but what about the things that are being lost?

In a new series, BBC News is taking a look at some of the vanishing professions around the world.

Our first stop on the journey is Spain, where the traditional way of sharpening knives is under threat of extinction.

The service arrives via motorbike on your doorstep - but sadly the tuneful whistle of Spain's knife-sharpeners is an increasingly rare sound on Spain's streets.

BBC News went to meet one Seville-based knife sharpener, Rafael.