You'll probably best off heading to Attleborough arms
Halfway between ground and station
For pubs in Nuneaton there's the railway tavern, though it wasn't great last time I went in there. There is a good pub called the Crown nearby too but it says it is shut... by the station with 2 or 3 pubs on it. There's one called lord hop which looks good and a couple of wetherspoons in town centre
Only really the legends bar at the ground