Thinking of tutor for DD in yr3 - central london - advice appreciated

[Spatz]

DD (just started yr 3) at lovely state primary in central london, but no good state secondaries in this area. A friend has suggested sharing a tutor to do some of the extra work required for private school entrance exams, but I think it's a bit too soon really.

I feel we should be able to support her ourselves and think about a tutor in a couple of years.

Does anyone have any experience of tutors and private school entrance and if so, do you have any recommendations.