Little locomotive back on the tracks. Is this the oldest engine in service in Britain?

Built in Brighton in 1841 Knowle is thought to be the oldest steam engine currently in service. It had clocked up a million miles by 1929 Credit: ITV News Meridian

Having had a complete overhaul, a 141-year-old locomotive is back in action.

Built in Brighton, and having seen service along the south coast, the engine - called Knowle - is back at the Kent and East Sussex Railway. But not for long. It's spending the summer on the Isle of Wight on loan to the island's steam railway.

Tony Green caught the little terrier engine on its first outing before heading west.