My method is to put my chicken in a roasting tin, having first covered the base of the tin with oil, and lightly brushed the top of the chicken with oil after pricking it all over, legs as well, to pierce the skin. Into the tin I then put a centimetre or so of hot water. Put on the lid and away you go at 170 degrees. The juices come out of the skin and brown the top (if you eat the skin you can cover it with salt but we don't) and the water in the tin keeps the bird from drying out and of course it will not shrink so much. It comes out succulent and juicy. Try it. I don't think you will find a better method. Toxophilus.