That's a Keston PR release about a trade award for their rig system.
I needed a big boiler and looked closely at Keston's C40, Atag's Blauwe Engel, the Viessmann Vitodens 300, and the MAN Heiztechnik EC38. After speaking to all the manufacturers, I felt that Viessmann offered the best technical support (followed by Keston).
I then went to a trade exhibition to see the the Vitodens 300, EC38 and C40. The first two had excellent build quality, the C40 was poor by comparison (and the rep on the stand knew nothing about it!) In the end I chose the Vitodens 300 which is being installed next month.
I heard on the grapevine that the Keston C40 flue is noisy compared with other boilers, although I can't confirm this personally. I did want to buy British, but didn't feel confident enough about the Keston.