Dozens of flats in a key borough are holding up to eight people per bedroom, according to the electoral register. Tenants in Tower Hamlets said it was "impossible" for so many residents to share one property and some admitted they had never heard of their apparent flatmates. In one case, 12 adults are still listed as voters at a three-bedroom flat in Mile End despite having moved out about four months before officials gathered data for the register. It raises the spectre of new electoral fraud in a borough plagued by claims of ballot-rigging.