Bob, I agree with you, they are spuds.
It`s not a rambling rose, going by your first image it is just an overgrown HT rose.Prune it back to the lowest viable buds and plant between the path and the fence.
Henry, you can safely cut it back to about 4ft. It will take a year to look good, but just go for it.Cut it just above a viable leaf node.
But peacepuffin hasn`t done that, Bilje.
peacepuffin, do you happen to have any pics of them flowering?
But crocosmia produce huge clusters of corms, not 5 or 6.
I would be inclined to pile it somewhere out of the way for a year, then mulch with it. As Bob says, it will deplete your soils nitrogen levels.
They look too big for Crocosmia corms to me.
Duncan, I think it would be boring if you kept the colours together, mix `em up and enjoy the variety. I assume they are only a couple of feet tall, so I would plant them and let them grow on for a year or two.
To be honest I would prune it and move it now. It may not flower this year, that`s the chance you have to take.