I would like to recommend my son's maths tutor who's been helping him prepare for his GCSEs for a few weeks now.
David has an objective and enthusiastic way of approaching Maths. I can see he genuinely loves his maths and this is what makes him so good at it. My son finds David easy to communicate with and feels that his tutorials are making a big difference.
Here's a link to his advert on HoL: http://www.harringayonline.com/forum/topics/maths-tuition-offered-2