Hi Man of Kent, ain't gettin' any youngerer eh ?
These pullout extender rails might help but you'd need get them fitted for you of course.
Perhaps 3 or even 4 mounted inside the wardrobe ?
Pull out so rail is outside of the wardrobe - hang without having to reach inside - then just slide the lot back inside the wardrobe & close ... or leave them out on extender until a helper can assist.
Either way it hopefully could make life easier.
They are available in the UK from what I've seen.
What they're called may differ slightly but you only have to ask or show a photo maybe?
The following pic may give a better idea of the rail extended.
You can also get 'coat hangers' with a swivelling hook that would perhaps better allow for the items to be turned at an angle - prolly unnecessary but ?