Can I ask when DS is going to do St Olave's test 2012 or 2013?
If 2012 it is a little late for a tutor, however for 2013 I can recommend a very good tutor, via PM, who is Orpington based.
It might be late if it is 2012 for some children and it might not be for some children. It depends on individual child. The question is what is the foundation of the child at the moment? How is he or she performing in Maths and English? Is the teacher available? I can testify to you that children were taught for six weeks and nine weeks for 13 and 11 plus respectively and they passed in Bexley and kent but this might not be the same for all children.
At least I know three children now who are now in Grammar school
When parents are advising they should remember that all children are not the same. What works for your child might not work for other children. There are some parents who are teachers, self tutored their children but do not disclose this in their posts that they are teachers either in secondary school or primary so please let us be careful about advice we give. Remember all children are not the same because it worked for A does not mean it will work for B, it does not work for C, it might work for D