The Soviets planned to invade Manchester.
(A map showing the route Soviet tanks would have taken is on display in an exhibition at the University of Manchester's John Rylands Library, Manchester. It shows the route chosen for taking the city which went along Washway Road, the Mancunian Way and Princess Road. These roads were considered wide enough for armoured vehicles and tanks to roll into the city centre.
Personally speaking, if I was going to invade a city, it wouldn't be Manchester. I think a nice little village in the Cotswolds would be more to my liking.)