Uk house swap/house pet sitters

We are a family of four looking for a house swap or pet/house sit. We need to stick to Europe for the moment due to travel costs. Our home is a work in progress and some parts are a bit dated. The kitchen/diner/sitting room is brand new and open plan and opens out onto the large garden. There are three bedrooms and a family bathroom. The area is quiet and family friendly with a lovely nature reserve and park just across the road.