Harrogate is the Army's Foundation College, so while you are there you are in education. You will remain in education during your 50-weeks specialist trade training at the Defence School of Healthcare Education.

Even if you don't join Harrogate until the later intake in March, this still counts as ...

It makes a difference whether you are joining as an Officer (going to Sandhurst) or as a Soldier (going through BARB test, Basic Training etc).

Officers don't have to commit to a cap badge until they are already in training, so there is quite a lot of flexibility.

Soldiers (which I think you mean ...