Standing in the gutter is handy – if hardly safe – for cleaning that particular storey, but how's he going to do the next one up?

David Johnston was most alarmed to glimpse this windowcleaner through the window of his central-London hotel. "He spent about 20 minutes outside on the narrow ledge oblivious to any risk; no doubt he will be back in a couple of months to clean them again – I just hope I am not there to witness it should he fall."

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