I missed out on booking a mock test with SGS PTA. I have just discovered they now have an online test that anyone can book into which may be of interest to some of you .Information on the website says it has a maths and English multiple choice paper that you will get % and standardised scores from and an English writing task ( it says this is not marked but you get sample scripts and general feedback guidance- a friend who sat her child for this last year says it was very useful) Hope this helps someone