mountfords wrote:

I know, lame!

The one or two I have managed to remove have taken a reasonable chunk
of the breeze block out so I wondered if there was anything that would
help to break them down - water, chemicals etc?

Buy a cheap saw and cut them off. Patch the breezecrap with garden clay
or almost anything else.

I hate that czd. I wonder why people use it. It might make sense if it
came in 8 x 4 ft blocks.