A single suction cup came included to be used with the conservatory roof ladder I have.
I replace it with this type instead lol
http://www.screwfix.com/p/triple-cup-suction-lifter/7912pTo be honest as the conservatory ladder can be used without the roof ladder section so I don't normally bother to use it. Most of the time on filthy ones the quickest way I've found if required is to pretreat them with a chem of your choice, Then give it a quick brush over, let dwell and rinse. This sometimes can be done all from the ground without using ladders at all. To kill green algae, lichen, moss etc I've found a weak hypo/soap mix works rather well. Or if you want a quicker way is to spray all the roof with ddac and walk away letting mother nature do the work for you.
Mike you can probably tell I hate conservatory roof cleaning with a passion. lol