The cattery are out searching the area on a daily basis as well monitoring the cctv they have attached to the cattery property. They have also setup a humane cat trap near to the location where they went missing. Think they are doing as much as they can to be honest.
I've contacted the local vets, cat protection facebook site as well as AnimalSearchUK and a couple of other sites similar to your own. We've set some posters local to the area and going to do another flyer drop into nearby houses today.
Because its such a rural location, there are two farms just across the road from the cattery, its very hard to determine how far they would travel, but we are basing the search on a one kilometre radius from the cattery.