Crab apple, wild cherry, sessile oak, alder or downy birch - which would you choose? The first phase of the Welsh government's plans to offer every household in Wales a free tree, to help tackle the climate crisis gets underway this month. 5,000 trees are up for grabs, at six hubs across the country. Caroline Evans visits one of the hubs, Blaen Bran Community Woodland in Cwmbran.