Thank you for clearing that up for me, as at undergraduate level it is made very clear, i.e. what grades are considered to be good i.e. 1st or 2:1, however it is not so clear at masters level. Most places just ask for a masters in an appropriate subject. I have been given an uncondidtional offer for my PhD on the basis of my first degree but they havent said anything about my MRes as in what they expect only that starting the degree wouldnt require me to wait for my MRes result since I already have my first degree. But I expect that they would expect me to pass as well as I can.