Syon Park Riding School
in Syon Park, Isleworth, Middx.
The former riding school is now part of a garden centre.
The Historic England listing dates it at c.1819-1826. Built for Hugh Percy, 3rd Duke of Northumberland. The most noteworthy feature is a 28-bay iron roof of composite truss construction. The designer is thought to be either Charles Fowler or Thomas Cundy I. [1]