Don't rely on a taxi turning up at the time Stated!
Crown and Abba both say they'll do a job and then just see when they can get the next taxi in that area to you. i have booked a run to the station before now to catch a train and the taxi still hadn't turned up 15 minutes after the time. I booked it the day before!!!!
A new companies just started that promises to not do that. Direct Taxis 01925 244244
You could also try 01925 411111 (I think) for Harry's
There is also Pink ladies which is lady only drivers. 0845 124 7465 http://www.pinkladiesmembers.co.uk/
A town with two stations
Watch out, Warrington has two railway stations, one for trains running East West (Warrington Central) and one for trains running North South (Warrington Bank Quay). If you are meeting someone at the station, make sure you both know which one! They are about 11/2 miles apart!