If you want a climber that grows REALLY quickly go for the Russian Vine, also known as 'mile-a-minute' vine.It gives a really good , very quick screen cover. Not the most noticeable flower on it but if it's cover you're after you could plant that first,then plant a climber with a nice flower next to it to intertwine and give more colour. Keep away from Lleylandii. You'll have to keep it's height in check or pay to get someone to do it for you. If you've got space, plant two or three climbers that flower at different times so that you've always got something in bloom. Good luck, Jan