Traverse right and heelhook on the birdfeeder.

Damn, didn't think of that. Beta ascent next time :)

Isnt there a bit of an avalanche risk?

There was a slab avalanche off my Clio bonnet minutes after this, I got lucky this time !!!

...looks like you might have suffered some plating under your feet as you traversed right.......

Thats a nice shed.
Is the roof waterproof any more?

(a) Your arms are locked off. So you can't move either of them. So you are going to fall off. Use one arm at a time so you can move the other. Think A shape not H shape.
(b) Feet.

I was just about to get into a fig of 4 before placing a "sinker" pick placement halfway up the roof but as pylon noticed, there was huge avalanche potential and my garden isn't big enough for the big yellow taxi to A&E

What did you use for pro ?
No 14 zinc plated self tapping cross-head.

B and Q's finest self tappers !