Cows caused slow moo-ving traffic this morning after escaping from a nearby farm.

Up to 40 cows went searching for pastures new and ended up on Bournehall Avenue in Bushey.

Police were called to reports of a herd of cows in the road and in people's back gardens at 8.25am this morning.

It is believed a farmer rounded them up and returned them to their field at 9.30am.