A couple of points to all you posters - please note it is a SKILL TEST not a Skills test. Secondly, nobody has pointed out that the test can legitimately be split in to two parts. Many candidates only achieve a partial pass because they simply become too tired and mess up the circuits or some other section.
Why not break the test in to two and have a rest after the nav section - some people may say that this costs more, but it does not cost more than having to repeat the test sections that were failed. Just a thought