1D star shows his ‘muscles'
Grimmy, 28, enjoyed watching the 1D star larking about in the outfit, topped off with his favourite beanie hat.
‘One minute Harry was wearing his trademark T-shirt and jeans, the next he was wearing the suit and running up and down the hill,’ an onlooker reveals.
‘He looked like Freddy Krueger. Grimmy was taking pictures and roaring with laughter.’