The company commissioned to build it were FM Conway. That should have been a bright red flag. FM Conway do roadworks. They fix infrastructure, and rebuild streets. They're a civil engineering firm at best, not structural engineers, nor gardeners; in other words, a deeply inappropriate choice for the company to make it happen. But I would bet good money that WCC have a great relationship with them for other contracts, and I would bet good money that whoever handed out the contract got some great tea money for their site visits.