As someone who has spent time today answering early Clearing phone calls, can I ask that you do your homework before calling a Uni.....
If you do not yet have your results it is pointless phoning. No Uni will offer you a clearing place on predictions !
If you cannot remember your GCSE grades, find them before you call. Have your exact grades/scores written down for your A levels, IB etc.
Do NOT get your parents or teachers to phone for you. We wont be impressed - you are supposed to be an adult.
Use your intelligence. Asking 'what courses are in Clearing?' because you cant be bothered to look on the website will not create a good first impression.
Be tactical. Middle-range Unis will have more clearing places than top ranking Unis. Unusual courses or unusual subject-combos will have more spaces than single subject degrees in standard 'school' type subjects - look at Social Policy rather than Politics, or Biology with French instead of just Biology, War Studies instead of History, International Development instead of Economics.
Find out which unis are hot off the mark here