Coming in late on this thread but, yes, I have had an orbit request on final at Jersey. Due to a hang-up with a departing commercial. Other aircraft in circuit who were also orbiting and go-around not really feasible as I would then have been in conflict with either said commercial or one of the other GA's in the circuit.
No real issue - bit bumpy off 27 at 500' odd - rate 1 turn & no big deal, just pretty unusual. But orbits at Jersey (Corbiere, Noirmont or even mid-downwind) are not at all unusual - even when doing your NR training - you just concentrate & sweat more
Doing it on 2nd solo - hmmm, probably not a good move if you aren't used to performing tidy orbits, especially below circuit height.