The approaches come almost a year after Royal Bank of Scotland paid £1.1bn for two of Canary's tower blocks occupied by investment banks - 5 Canada Square, leased to Credit Suisse First Boston, and 25 Canada Square, leased to Citigroup. Those sales were completed before Canary was taken private. At the time, Canary said it would continue to market its estate to investors and developers, regardless of whether sale of the whole firm completed.