Office stationery (SW16 Streatham)

Hi, I am downsizing the stationery cupboard at work in London. Does anyone know of a charity or school near The City (EC2V area) who could benefit from lots of used lever arch files, brand new index dividers, files, folders, pens, pencils, paperclips, notebooks, envelopes etc? Stuff would need to be picked up from EC2V 8EY on an arranged day through the week.