FIELD Fisher Waterhouse is believed to have put in an offer on 80,000 square feet at Riverbank House in the City. The law firm is thought to have sublet the first three floors of the building on a 10-year lease from hedge fund Man group, the website Property Week said. The 320,000 sq ft site was built in 2010 for Man but cuts to its workforce in the last two years are thought to have led it to sublet