Traffic has been stopped on the M4 in both directions this evening (Tuesday).
It’s after a number of cows managed to access the carriageway at around 6.10pm.
The motorway is blocked between junctions 16 (Swindon) and 17 (Chippenham). 
Motorists can expect delays as National Highways – supported by Wiltshire Police – deal with the escaped animals.
“Please be patient we’ll get you moving again as soon as we can”, a spokesperson said.
