There are two ways to start a search. The first is to log into your account, then click 'Search' which is on the grey list to the left.
It will open up a page where you can insert all the criteria and filters that will help ensure that the Petsitter's displayed are suitable.
Or, you can start a search by entering your post code into the home page, and you will start a search and the filters will come step by step. However, this type of search does not allow you to change the radius.