Nest boxes for barn owls The Barn Owl Trust reports that around 75 per cent of known barn owl nests in the UK are now in boxes, because their natural nesting sites in agricultural buildings or holes in trees have become scarcer. A pair of barn owls used to nest on Brays Farm in Surrey, but after a drought a few years ago they haven’t bred on the farm since. Your donation will enable us to buy the materials for our volunteers to build nest boxes, which will hopefully encourage barn owls to breed on Brays Farm once again Target £350 Raised so far £665 £713 incl. Gift Aid Manage Cookie Preferences