If not no worries, just rent a ladder and fix it. It could be anything that broke it, such as a fat pigeon.
I can get the ladder no probs, and I'm sure it's an easy fix. It's more the fact he blames me for it being broken and it's his dodgy guttering work. I was trying to help him in the first instance to help get it fixed.
My neighbours guttering at the rear of the house was leaking against my extension, has been for years I suppose and it's rotted the fascia board away. It needed changing anyway, so when I went up to repair it I told him I'd re-sealed the cap on the end of his gutter. Cost about £2 for gutter sealant which I had anyway and it's me that benefits so it was no big deal. We get on anyway.
The neighbour to the other side is brilliant. Would do anything for you, has fitted my carpet for nowt etc. If it was his guttering it wouldn't be an issue, because he's not an abrasive old turd.
Thanks for all the comments guys. Not sure if I'll stick my penis through his door however, though the temptation to t-bag the miserable old codger is appealing.

I agree it's less hassle to just to do, so I'm going to get it sorted. I just hate the old turd getting his own way.