Tip - Make sure your daughter doesn't spend too long on a question if its only worth 1 point, move on and spend more time answering a question thats worth say 5 points.
The English paper normally has a question at the end thats worth loads of points, and I have heard so many girls say they ran out of time so didn't do the last page. So, make sure she remembers to do the last question (the one where you have to insert all the missing punctuation marks, as thats worth lots of points).
Tell your daugher that yes the English paper could be really hard and maybe she wont completely understand it all, but just to try her best, they normally give the English paper first.
Once the English paper is done, tell her not to think about it anymore, to move on, I think a lot of the children that sat the last test thought well thats it, I've blown my chances, as the English was so hard.
Plan something lovely to do when the test is over, go out to lunch or something.
Dont forget a watch as there wont always be a clock in sight. And if its allowed take a snack. Make sure she has breakfast in the morning, that will help her concentration levels.
I wish you loads and loads of luck, Im sure she will do very well.
I agree with the comments above. The English is the first paper they sit, is usually very difficult and can knock their confidence. I told my daughter (who is now in year 8 a Chelmsford C High) to read the extract twice, answer what she could then turn to the back page and do the last portion (which is the grammar correction etc) as she was very good at that. I told her to finish that (as it is worth something like 12 marks) then go back and finish the rest of the paper (I also told her that if she really didn't know the answer, guess, as it was better to put something down if she had time). I also told her that even if the English paper was really difficult and she thought she had not done well to just think to herself that she had 2 more papers to do and to concentrate on doing well on them (plus their nerves are probably less by then!). Good luck!