Hi folks, Firstly I am a man, and secondly I am attempting Xmas dinner for first time tomorrow. I am not complete idiot but an very lazy (esp at Xmas) so we have Marks and Spencer Turkey crown, ready to cook roast potatoes and ready to cook parsnips. My problem - age old - is that the potatoes need to be gas mark 8 and the turkey gas mark 4. This is a big difference so cooking everything at mid point might not right. Would there be much difference between top and botton of oven? If I was to cook all at gas mark 7 and put turkey at bottom shelf with tin foil, would that be likely to work? Would I just allow the same time as if it was gas mark 4?? Many thanks for any advice!