The signs were installed on 30 April 2017 and at the time is was realised that the backing timber was not going to be suitable. At the time some of the timber had already started to bend since purchased.
Marine ply has been bought as a replacement with plans to replace after winter or even before.
The photos below from Trevor show that with a period of 3 weeks the timber has curved and the signs are at risk of damage. The backing timber was replaced in June 2017 and a panorama sign added to the moorland.