Current working solution using JQuery:
Removed name and id from the input I don't want autofill on and added an identifying class. I then created a hidden input with the field name and id I want. Then on form submit I copy the value from the field with no id and no name (finding it by my identifying class), into the hidden field with the name and id.
HTML
Javascript
$('#myform').on('submit', function(e) {
$("#city").val($('.identifyingclass').val());
});
I reckon this should work as I don't see autofill latching on to anything other than an id or name.
