I did my course in October 2016 in Cambridgeshire so can’t help with the NQE side of things. However, the course I did was two days theory with the theory test at the end of the second day. It is mostly common sense with probably the hardest part being the aeronautical map reading, but the NQE should take you through that in detail to ensure you understand them. Once you get the hang of it, they are pretty straight forward.
One thing I would push on if doing the course again is things like the legalities of the 50m bubble, can you take off/land from public land, e.g. footpaths (technically you need landowners permission for take off and landing), exactly what constitutes congested areas and those sorts of things. Its good to get all that clear in your own mind. Also when and when not to submit NOTAMs etc.
Hopefully, a good NQE will cover all of this, but if you find gaps, don’t be afraid to ask - make sure you get your moneys worth
As for the practical test, as has been mentioned, this is about making sure you fly according to your approved OPS manual. Know your procedures, especially emergency ones and try to relax. For me it felt like my driving test (that took me back a few years), but they aren’t there to catch you out, simply to make sure you follow what you have said you are going to do, don’t forget it is all based around safety, ensuring the safety of those that might be around you, safety to other air users and yourself.
As for the OPS manuals, there is a CAA template, but some NQE’s will actually write the OPS manual for you based on your craft and what you are going to do. Again these will be heavily templated, but will get you going much more quickly if that is what you are after.
Don’t forget for the flight test you will need insurance cover.
Hope that helps.