In reply to mason_7:
You need to be confident soloing VDiff. That's the bottom line.
The climbing's not hard, but you get high quite quickly, a fall would be potentially disastrous from most of the route (as observed) and you want lots in reserve, even in perfect conditions.
If you do the Diff grade start up the parson's nose itself (as opposed to the blocky gully up the right hand side) then the climbing's easy, BUT there's a very exposed downclimb into the notch at the top of the gully. You'd need to be very experienced / confident to do that without a rope and someone else holding the other end of said rope (it's not actually that hard, but that's not the point) .
So if you're on your own, and if you're confident soloing VDiff, start up the gully.