If you mean the 2002 TV series,then according to the Internet Movie DataBase,it was Downham nr Clitheroe
This is what it says of the location:~
Born and Bred" (2002)
The main filming location Downham near Clitheroe, Lancashire is a privately owned village. It's owned by Lord and Lady Clitheroe. Every house is rented and certain modern things are banned from being used in the town by the tenant's contract, for example external areils and satalite dishes. This keeps the buildings looking like they did many years ago, which is fitting for a series set in the '50s