Thanks so much! I’ll try a few more experiments based on this and try and implement an array.
Would the method you are using be able to tell if a user input contains an approved post(zip)code, rather than look for an exact match?
I would expect a user to input a full postcode ie. “G1 1BB” but I would only need the code to approve it based on it containing the area code “G1”. If it were looking for an exact match, I would literally have thousands of items to enter into the array… not impossible but not pleasant either!