On Sunday afternoon, hundreds of people gathered in Bellfield Street for the BikeFest. It was an opportunity to look at, ride and talk about all sorts of bicycles, many of them highly unusual. The police were there to help register your bike to deter thieves. There was a swap-shop for bike parts, advice on bike maintenance and a workshop on what might help to make Portobello more bike friendly. David Calder took his bike along to find out more.