I store my motorhome at Yew Tree farm near to Great Budworth which is 5 miles from Knutsford. They also store cars and happily trickle charge batterys for a couple of days each month.
http://www.yell.com/biz/secure-indoor-parking-northwich-3325609/Also down the road at Appleton - TR Bitz also offer a car storage location.
http://www.trbitz.com/Both these companys are very hot on security and very vague to there exact location to deter the naughty people in life !
http://www.lancashirecarstorage.co.uk/vehicles.php