Plot: Three model testers try out the latest high-spec toothbrushes under the watchful eye of Britain's Young Dentist of the Year, before Jon Bentley puts a £20 budget model through its paces to see whether everyone is simply pouring money down the sink. Recent developments in battery technology have resulted in a glut of brand new e-bikes, so the G Team rides three of the newest models to find out which one the canny commuter consumer should choose