I have just looked at Geography courses in Clearing - they have still got vacancies at Durham, Bristol, Newcastle, Durham, Warwick and Lancaster (as well as some London universities which DS is very unlikely to consider), as well as lots of the post 92 ones. So that's hopeful should results not quite be on target.
@blametheparents yes, you are spot on with your thoughts, I would have thought. DS (doing three A Levels) had quite a lot of free time in his sixth form timetable. Possibly why they all did the Pre-U in Year 12.