From the Portsmouth festivities web site…
“Roll up, roll up for a celebration of life on wheels. Bring your bikes, blades, scooters and skates to Castle Fields between 10am to 12noon and decorate them carnival-style with the help of local artists. We’ll be wheeling our way along the seafront in style from 1pm. Whether you’re there for the ride or you simply want to enjoy the sights and local craft stalls, you’re sure to have a spectacular time.”