I'm still having trouble with windows over bays, I think other than getting customers this is my biggest problem at the moment.
The Victorian ones seem to have the bay at a height such that the ladder section gets in the way of the pole - unless I were to climb quite far up the ladder but then I start to really worry about breaking the plastic gutter. It seems that you need your shoulders to be near or over the top of the ladder or it is always getting in the way but that puts your head above the gutter and it start to bend rather a lot.
I found using my step ladder was actually pretty good to get round all this but sadly most of time the ground in front of the bays isn't suitable for placing a step ladder and going up 5 or 6 steps.
Then I did another Edwardian(?) house with really tall stories and two side by side windows over the bay. The bay had walls round most of it such that the ladder had to be crazy steep. The bay roof itself was lead covered and at about 30 - 40 degrees, I really just wanted to get on the roof and work from there but it didn't feel like a good situation to explore the frictional properties of lead, so I wimped out. I managed to mostly pole one window from on one the side of the bay but even then messing about with 8 foot of pole standing 6 or 8 feet up the ladder just feels like bad weight distribution.
I think the answer is that I need to go higher up the ladder, then the ladder top is out of the way and the pole can be a bit shorter too but I'm too concerned about the gutter and toppling over backwards :-)
Interestingly, while I was messing around on this house (a friends, not a customer) trying to work out what to do, no less than three people from houses near by asked me if I would do their's - and I had to say "not yet!" but apparently no one can seem to find cleaners round there. It did make me wonder if other cleaners don't like those bays either because all the houses had them.