Comment by dairylee

Although it's not quite sheep Newcastle has a Town Moor (Larger than Central Park) which has grazing cattle. There's also a farm not too far from the city centre which has grazing sheep.

https://en.wikipedia.org/wiki/Town_Moor,_Newcastle_upon_Tyne

https://www.bbc.co.uk/programmes/p03hm60d/p03hm2x8

https://maps.app.goo.gl/vojeS3eDTFznpYwMA