There are two classes in the competition: one for specialist independents and the other for symbol group members, multiples and co-ops with delicatessen counters.
All finalists will be given a commemorative silver plaque and the national winners in each class will receive £2,500, with regional winners receiving £500.
Dairy Crest trade relations controller Stephen Gover said: "This competition plays a vital part in our efforts to encourage counter staff to improve their knowledge of the cheese they are selling. We've had a promising take-up, but we hope for a further several hundred entries to be returned before May 31.">>p18 How to enter