Hetty58
There's some very strange, revealing comments here - such a disappointment. Many say 'Go ahead, do what you want - as long as nobody sees it - break the law.'
Here, we have the typical village green, church and pond - right next to a busy road and shops - at the top of a hill. The churchyard was full long ago.
Upon finding that they can't put ashes there, people scatter them on the green, causing regular annoyance and complaints. Dusty cars and shop windows, irritated eyes and lungs - but never mind, do exactly what you want - just don't buy any unwrapped food here! Remains put outside the churchyard used to be the final humiliation for criminals - and the poor.
That handful of ashes and finely ground bones (oh, yes, they have to grind some bones) is often referred to by a person's name (Mum, Dad, etc.) - just very, very weird. It's like they didn't die at all. The popular words that avoid death too - like 'passed' all seem an acceptable collective madness or denial?
People are so odd, aren't they? Alongside the current discussion on 'principles' too!
The Co-op website says you can scatter ashes
In a churchyard, cemetery or natural burial ground.
Over the sea, a river or body of water.
In a national park or public space.
On private land (back garden, sports ground or private farmland)
The OP is writing about a ruling about Royal Parks being 'special'.