Code:
<!DOCTYPE html>
<html>
<head>
<!-- Google Maps and Places API -->
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?libraries=places"></script>
<!-- jQuery -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
var markers = [];
function elapsed(rfd) {
var rs = (new Date().getTime() - rfd.getTime()) / 1000,
days = Math.floor(rs / 86400),
hours = Math.floor((rs - (days * 86400 )) / 3600),
minutes = Math.floor((rs - (days * 86400 ) - (hours * 3600 )) / 60),
secs = Math.floor((rs - (days * 86400 ) - (hours * 3600 ) - (minutes * 60))),
fet = secs + 's';
if(minutes){fet = minutes + 'm' + ' ' + fet;}
if(hours){fet = hours + 'h' + ' ' + fet;}
if(days){fet = days + ' Day' + (days > 1? 's' : '') + ' ' + fet;}
return 'Created: ' + rfd.toLocaleTimeString().toLowerCase() + ',<br>' + fet + ' ago';
}
function createMarker(latlng, html, map) {
var ref = $.trim($('#reference').val()),
infowindow = new google.maps.InfoWindow({
content: ref || html
}),
marker = new google.maps.Marker({
map: map,
time : new Date(),
position: latlng,
html: html,
icon: defaultPin,
infowindow: infowindow
}),
$tm = $('#themarkers').append('<option value="' + html + '" title="' + infowindow.content + '">' + html + '</option>');
$tm.get(0).selectedIndex = 0;
marker.addListener('mouseover', function() {
clearInterval(infowindow.timer);
infowindow.setContent((ref || html) + '<br>' + elapsed(marker.time));
$('#supplementwindow').html(infowindow.content).fadeIn();
infowindow.timer = setInterval(function(){
infowindow.setContent((ref || html) + '<br>' + elapsed(marker.time));
$('#supplementwindow').html(infowindow.content);
}, 300);
infowindow.open(map, this);
});
marker.addListener('mouseout', function() {
clearInterval(infowindow.timer);
infowindow.close();
$('#supplementwindow').fadeOut();
});
marker.addListener('click', function() {
var oe = this.optel;
$tm.get(0).selectedIndex = $('option', $tm).index(oe);
$tm.trigger('change');
});
marker.optel = $('option', $tm).last();
$tm.get(0).size = $('option', $tm).length;
markers.push(marker);
}
var up206b = {};
var map;
function trace(message) {
if (typeof console != 'undefined') {
console.log(message);
}
}
up206b.initialize = function() {
var latlng = new google.maps.LatLng(52.136436, -0.460739);
var myOptions = {
zoom: 13,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
}
var geocoder = new google.maps.Geocoder();
var bounds = new google.maps.LatLngBounds();
$('#formcont form').submit(function(e){
var addresses = $('.address', this);
addresses = [addresses.eq(0).val(), addresses.eq(1).val()];
addresses.forEach(function(address, refnum) {
if (address) {
geocoder.geocode({
'address': address
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
createMarker(results[0].geometry.location, address, map, refnum);
bounds.extend(results[0].geometry.location);
map.fitBounds(bounds);
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
});
e.preventDefault();
});
jQuery(function($){
$('#removemarker').click(function(){
var tm = $('#themarkers'), si = tm.get(0).options.selectedIndex, $o = $('option', tm).eq(si), i = $o.val();
if(!i){return;}
$.each(markers, function(idx, v){
if(v.html === i){
v.setMap(null);
markers.splice(idx, 1);
return false;
}
});
$o.remove();
bounds = new google.maps.LatLngBounds();
if(markers.length){
$.each(markers, function(i, v){
bounds.extend(v.position);
});
map.fitBounds(bounds);
}
if(markers.length < 2){
map.setZoom(markers.length? 13 : 8);
}
});
$('#themarkers').change(function(){
this.title = this.options[this.options.selectedIndex].title;
var i = this.value;
if(!i){return;}
$.each(markers, function(idx, v){
if(v.html === i){
map.setCenter(v.position);
map.setZoom(10);
return false;
}
});
});
$('#showall').click(function(){
$('#themarkers').get(0).selectedIndex = 0;
if(!markers.length){
map.setCenter(new google.maps.LatLng(52.136436, -0.460739));
map.setZoom(13);
return;
}
map.fitBounds(bounds);
if(markers.length === 1){
map.setZoom(13);
}
});
});
</script>
</head>
<body onload="up206b.initialize()">
<div style="width:300px; height: 500px; float:right; padding-left:10px; padding-right:10px; margin: 50px 90px 50px 75px">
<h1 align="center">Map Search</h1>
<div id="formcont" style="border:1px solid #ccc; background:#e5e5e5; padding:10px;" align="center" >
<form >
<br>
Location 1 <input type="text" id="address">
<br>
<br>
Location 2
<input type="text" id="address2">
<br>
<br>
Reference
<input type="text" id="reference">
<br>
<br>
<input type="button" value="Submit" onClick="up206b.geocode()">
</form>
</div>
<div id="menu" style=" position: absolute; margin: 45px 89px;" >
<select id="counties" >
<option value="">Select County</option>
<option value="bedfordshire">Bedfordshire</option>
<option value="buckinghamshire">Buckinghamshire</option>
<option value="cambridgeshire">Cambridgeshire</option>
<option value="hertfordshire">Hertfordshire</option>
<option value="northamptonshire">Northamptonshire</option>
</select>
</div>
<script type="text/javascript">
$("#counties").on("change",function(){
var cnt=$(this).val();
var bounds = new google.maps.LatLngBounds();
switch(cnt){
case "bedfordshire":
bounds.extend(new google.maps.LatLng(
52.22, -0.41));
bounds.extend(new google.maps.LatLng(51.8797, -0.4176));
break;
case "buckinghamshire":
bounds.extend(new google.maps.LatLng(52.18, -0.83));
bounds.extend(new google.maps.LatLng(51.9206978, -0.6529431));
break;
case "cambridgeshire":
bounds.extend(new google.maps.LatLng(52.29, -0.13));
bounds.extend(new google.maps.LatLng(52.082174, -0.029477));
break;
case "hertfordshire":
bounds.extend(new google.maps.LatLng(52.082174, -0.029477));
bounds.extend(new google.maps.LatLng(51.8031689, -0.208661));
break;
case "northamptonshire":
bounds.extend(new google.maps.LatLng(52.492298, -0.684233 ));
bounds.extend(new google.maps.LatLng(52.09, -1.03));
break;
}
map.fitBounds(bounds);
})
</script>
</div>
<div id="map_canvas" style="height: 500px; width: 500px; float:right; margin:20px 75px;"></div>
<div id="supplementwindow" style="border:1px solid #ccc; background:#e5e5e5; align-content:center; float:left; position:absolute; margin:200px 0px 200px 200px; padding: 5px; border-radius: 12px;" >
<input type="button" value="Assign">
</div>
<div id="menu2" style="position: absolute; right: 200px; top: 450px; border: 1px solid #bbb; padding: 5px;
border-radius: 12px;"><select id="themarkers"><option value="">Select Marker</option>
</select><br>
<input type="button" id="showall" title="Or Reset if None" value="Show All"><br>
<input type="button" id="removemarker" value="Remove Marker"></div>
</body>
</html>
Also, I have managed to find all the countie with just the coordinates for the county lines only. If you open each txt file you will see that the latlng are paired up perfectly. Would this be better for you to use? See what you think. 
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