Sovereign Group Our business was established in 1973 and we have been successfully making windows & doors for over 43 years. We offer a supply & install or supply only with one of the widest range of PVC- U windows, composite doors, aluminum windows and engineered timber windows available in the UK. Sovereign Group targets the public purse and mixed tenure sector on a National basis. We aim to deliver the best value package to the marketplace, value being the combination of price, product, service and social value. We would like to discuss any window and door programs you are undertaking at the moment or any future fenestration and external envelope schemes you are planning or have visibility of. We would be pleased to receive any enquiries you require prices for.