Watch: Punting from Oxford to Cambridge

Four students are punting from Oxford to Cambridge to raise funds for the Alzheimer's Society.

Travelling at around 2mph, the group from St Johns College, Cambridge, say they expect the 200-mile journey to take them about 12 days.

The journey takes them from Oxford to Banbury, then to Northampton on the Grand Union Canal, up to Peterborough on the River Nene, and finally to Cambridge via Ely.

Initially they aimed to raise about £5,000, but having already hit that target, they are now aiming for £10,000.