Thanks Dan. Yes my intention was to face the slope Northwards.
I haven't worked out whether to use a pole or not. My options are mostly on drain pipes with Velcro, next to the bricks of the house. Not ideal I know.
I have kids so any pole in the borders of the garden will get kicked by a ball or shaken.
Top of the fence would be good but then it interfers with the neighbours a bit.
Will consider blocking up the base. Thanks.