If you want to get a special plant for your situation, B&Q, Hombase and the like, are the very last places you should go to. Their staff are not botanists and they never claim to be. Go to a good nursery first, or a good garden centre with a reputable enquiry desk, with knowledgeable staff second. They will want to know the layout of where you intend to place the plants and the kind of weather conditions you experience. Decide exactly how much work you're realistically prepared to give these plants. Be honest with yourself and you'll find you'll get reasonable advice. Some of these bushes/plants can be quite pricey, so it's in your interest to get advice from the experts. Many of the previous answers here may well be good for you, but none of them know exactly what your situation is. Good luck.