Ok i give in
Here is the top part that ive done as a rockery
before the plants went in

Here it is as it is today with a Pleiris at the back and some heathers.

Hopefully they will grow quickly and cover the space. The filter outlet im going to put slate on the top of it and then a nice big flattish rock to cover it all.
Here ive got some more stones in the waterfall and going to get some more plants to grow up and over to cover the black liner.
I havent done the bottom part of the fall yet as it keeps raining. On the other side im going to get a wooden high planter to run along the length and have plants coming over from that side as well

So, hopefully by next summer it will be covered completely.
Will update again when i do more

And...one of my roses

Its taken it 4 years to flower again, so must like it here better.