Answer: It only has one side.
Hearing bundles, and for that matter, all tribunal documents, are normally printed single-sided.
There is an argument to be had over whether this is a good thing. Single-sided printing means that the blank side can be used for notes, and it is easier to ‘flag’ the bundle with post-its. On the other hand, it does produce bulky files of paper that are hard to manoeuvre. Then there is the environmental damage.
Regardless of your position in that debate, it is best to fall in with the general practice and give the tribunal what it is used to.