It's been a while since I have visited the forum, it was my DD that got in to Kendrick from the waiting list having scored 87% in VR and NVR. On the day she was 18th on the waiting list, but within an hour of the offers coming out she was sat in 1st place as 17 others had been given places at their first choice school and offers had been made from the waiting list. We were lucky I think as I've noticed that there hasn't been as much movement that early on in the 2 years since.
At home my daughter was getting 90-95% in the test papers, although that was on NFER and not Bond. We didn't use a tutor, but did attend a couple of sessions at a 11+ centre after receiving details on a flyer after the open evening in September.
Quite a few girls do sit the test from The Abbey, there are atleast 8 Abbey girls in my daughters year, she is now in Year 8. Given that the tests are set by NFER, I would suggest that you need to be aiming for 90+% on these papers as nerves do get the better of most children on the day.
I am just about to go through the whole thing again myself, but this time with DS for RBS