DS1 - 2008 entry - mid-340s
DD - 2012 entry - 290, having done something very unfortunate with her VR paper, but did very well in year 7 at her 'non-ranked allocation' comprehensive and subsequently got in to SHSG where she seems to be doing well. Had the places not come up at SHSG, or had she not got one of them on the retest, she would still be doing well where she was, but as we had put her name on the CI list, it seemed only reasonable for her to have a go when the occasion arose.
DS2 - 2014 entry - 378.962
None of ours saw hide nor hair of a professional tutor, but were occasionally pushed in the direction of a practice paper in the months leading up to their exams. DS1 I signed up for 3 months of online practice, but I'm not sure that I actually get my money's worth of usage of it out of him.
People have commented that what we did was every bit as much 'tutoring' as those whose DC were treated to paid help for hours a week for months or even years in advance of the exams. To this I have said before, if they would like to pay me what they paid their tutors, to do as little with their DC as I did with ours, I wouldn't say no