A LITTER picker has raised concerns over vandalism at a former residential building in Halliwell due to fears that there is asbestos at the site. Council-owned Darley Court has been boarded up for several weeks but debris from the building has been spotted on the green next to it. Officials from Bolton Council have said they are now making the building, which faces St Joseph’s RC Primary School, more secure. Litter picker Gwyneth Bailey said: “I collect litter in the area quite regularly and I’ve noticed debris from the building being left in the area, there’s been chairs, bits of equipment and pipes covered in lagging which could be asbestos.