Search Field Customisation

Hi

Here is my test page: http://therubbishclearancedirectory.sandboxjokadesign.co.uk/?listing_type=gd_place

I am setting up a very simple directory/database that will have just one category (for now) and which will be searchable by only the post code. Therefore I would like to remove or hide the first of the two search fields altogether, so that the user just simply types in a postcode and hits the search icon. How can this be done?

Also, how should I add a simple line above the search field that says, “tell us where you want your rubbish collected from” – or similar?

Many thanks.