Dry stone walling is flexible; it does not use mortar; it is good for wildlife; it is a sustainable. The only minus points arise if fuel is used for quarrying and transporting the stone.
This video is of a Chelsea Fringe event in Crossbones Garden, near London Bridge Station. Participants receive a certificate of attendance at the end of the session. John Holt is a great teacher.
In addition to many other design objectives, public parks should be designed as good places to hold public events and demonstrations. The main avenue in Greenwich Park was not designed for this purpose but serves it very well, as here for a memorial event for a British soldier, Fusilier Lee Rigby of the Royal Regiment of Fusiliers, who was attacked and killed by Michael Adebolajo and Michael Adebowale near the Royal Artillery Barracks in Woolwich. Rigby was off duty and walking along Wellington Street. Two men ran him down with a car, then used knives and a cleaver to stab and hack him to death. Armed police officers arrived five minutes later. The assailants, armed with a gun and cleaver, charged at the police, who fired shots that wounded them both. They were apprehended and taken to separate hospitals. Both are British of Nigerian descent, raised as Christians, who converted to Islam (info from Wikipedia).
Please see this page for video reviews of selected show gardens.
I’ve been too hot at Chelsea and I’ve been too cold. On Press Day, in 2015, I was too wet and too windswept. When the sun came out in the afternoon, the Press had to leave so that the Royal Family could enjoy the show. I’m not a republican, yet, but the rain did fall like stair rods. So what of the design quality of the Show Gardens? I thought some of the Fresh Gardens, on Royal Hospital Way, were better than most of the large gardens on the Main Avenue – some of which could be described as Stale Gardens.