We've reported it to the real estate agents/property managers, and I'm going to be giving them a phone call on Monday to see whether we can get firstly a tradesperson or similar to come out and deal with the task of removing the half-a-fscking tree from the back garden so we can get at the washing line again, and secondly a tree surgeon to have a look at the remaining half-a-tree which is still standing and recommend whether it can be left alone (doubt it!); whether it needs to be trimmed or lopped (so if it does fall over it won't cause major structural damage to the neighbour's house, the house we're in, or the car parked in the driveway); or whether the blasted thing is so unstable there's no chance of it remaining up safely, and it needs to come down completely.
After clearing a few branches away from where the clothesline access was, we've discovered the clothesline frame has been bent down and forward to the point where the poor thing ain't usable (I would not be wanting to try and straighten out the gorgeous gentle curve the support strut has been bent into, quite frankly - the thing is so old I think it would snap instead). So we have to report that to the real-estate people as well. It also took one tile from the roof of the lean-to shed which contains the laundry and the exterior toilet. Given the size of the blasted thing, I'm almost surprised by the amount of damage it *didn't* do - if it had fallen directly to the right (facing toward the back fence) the blasted thing could have taken out the entire wash-house in a single thump, but instead it fell to the lower right, which means it clipped a single tile from the wash-house lean-to (and given we don't use the exterior toilet anyway, a leaky roof there isn't really an issue) and mostly hit the clothesline.
But either way, I get to call the real-estate people and find out what's going to be happening. I sent a couple of emails through their web-page over the course of the weekend to let them know the state of play; I'll be following up by phone today to see how fast we can get things moving. I may just mention that the longer they delay on this, the greater the chance the passionfruit vine I planted last year is going to regard the whole lot of fallen lumber as fair game for growing into!