Joanna Rowsell launches new Union Jack Bikes at Lee Valley Velodrome March 22, 2016 - News Fresh from her medal winning performance in the Track World Championships, Olympic Champion Joanna Rowsell returned to Lee Valley to launch the new Union Jack Bikes range of Frog bikes. To help celebrate was a whole class from the local nursery and assorted stockists, customers and well wishers. The kids loved the bikes which were soon at the centre of a good-natured scrum. Joanna conducted an impromptu medal ceremony for the delighted kids and then took to the track with the adults and teenagers. The bikes, which cover the full range from balance bikes through to hybrids will be among those assembled at Frog's new factory in Wales. Each bike carries Joanna's signature and is available from Frog Stockists today.