Workers have begun undertaking the 'world's toughest gardening job' by using a cherry picker to trim the famous 300-year-old hedges at Powis Castle.Gardener Dan Bull will spend ten weeks painstakingly pruning the gigantic 55ft (16m) hedges at the historic venue in Welshpool, mid Wales.Each summer, he scales the castle's yew tumps and hedges using a hydraulic cherry picker and powered shears to keep them in pristine condition for the rest of the year. Source: SWNS