A developer with excellent experience with Google Maps API would be suitable. We require the user to be able to enter their current postcode and how far they are happy to travel (in miles). We then require their current location and travel radius to be entered on the map. We then have a list of 'items' (more info when winning bidder is chosen due to confidentiality) that need to be plotted as long as they fall within the travel radius. We want to be able to have our own icons for map 'pins' and be able to put some HTML into the box when a user clicks on a map pin.