Reach Tests
The first round consisted of CV, reach test and group discussion. As far as I know, if you are dismissed, you are not told what part you failed.
I was not asked to hold the reach for any length of time, but I am 6ft. We were asked not to look at the people doing the reach test, so I can't tell you if the shorter people were asked to do this.
Hopefully, someone else out there can answer this for you.