I had the same problem when my son took the 11+. The AE workbooks are for indepedent schools entrance exams as well as the 11+ and, as far as I know, there is no such thing as an 11 + curriculum so it is hard to know what is relevant.
The way I approched the NFER maths isn't recommended by tutors because it uses the tests papers for practice rather than testing, but it worked for my son. That's what I did, if it's any help:
I asked my son to do the first NFER test, then checked it and made a list of all the topics that he needed to work on.
For each of theses topics, I tried to find out what his level was, and then I built up to the level of the tests with a mix of explanations, and exercises. I used the AE worbooks as support for myself, and for exercises, but not systematically.
I was also using the IPS tests (6mns and 35 mns) that are very compatibe with NFER, but I think a bit harder, and I was going through the same process, listing all the areas that needed work.
Once we had been trough all the topics from my list, I asked my son to do the second NFER paper, repeting the same process with all four papers.
In the end, I was fairly confident that we had covered all the topics used in the NFER papers.
This method is only useful if your child is starting year 6 and you are close to the exam. If your child is staring year 5 you would spend time teaching something that could be taught at school anyway.
Best of luck