Prior to the foot and mouth outbreak there used to be free-roaming cattle on Wanstead Flats (historically, it was where farmers would fatten up their livestock before taking them into Smithfield Market, and why there are cattle grids around Leyonstone, Wanstead and Woodfood). They used to wander around where we live. eg
It wasn’t uncommon to see cows stood on a driveway eating flowers in a garden, blocking cars in, or just stood in the high road, blocking traffic. It used to be the go to excuse for people being late. I mean, who’s going to argue with a huge cow?