sharply and the construction industry is struggling to get supplies. the huge boost in demand as more building projects are getting under way after the lockdown is the main cause of the shortage. at the same time, climate change is increasing the pressure on supplies, with wildfires damaging vast areas of woodland in parts of the world. the uk imports around 80% of its timber and many are calling for the uk's forestry industry to be encouraged and supported, so that more sustainable supplies of wood are possible in future. our environment and rural affairs correspondent claire marshall reports. in rural herefordshire, the architects of the future are at work. they are piecing together a timber frame house. they are students, learning to build in a sustainable way with a low carbon footprint. but there is a problem. this build, along with countless others across the country, has been badly hit by the worldwide shortage of wood supplies. in every sector of the timber supply market, prices have gone up, supply chains have been less