In the attached picture it's far easier to create a sketch on the highlighted face but the holes need to be from the other side.

What's needed is the ability to select a face then points from any sketches even on different planes. On lots of occasions I need holes from both sides of a body, this means creating 2 identical sketches one for each side. Or holes through multiple bodies at different sizes so I can end up with 5 or 6 identical sketches at different levels, I should only need one sketch and the ability to select a face first then the points from a single sketch.
Thanks Mark