SMC Alsop is understood to be designing a 43-storey skyscraper on the periphery of the City of London.
The extraordinary tower is on the cusp of being lodged for planning permission with the Corporation's planning bosses.
The project will be Alsop's first venture into tower design, so architectural observers will be waiting with bated breath to see the designs.
There has also been some speculation that the tower may be more conservative than Alsop's usual fare in order to ease its path through planning.
One long-term planning guru said of the scheme: 'As long as it's residential, it may not have that much trouble. Residential towers of that height are not that unusual these days'.
The commission will come as good news to the troubled SMC Group, following the recent machinations at board level which saw founder and chief executive Stewart McColl sidelined from his chief executive role.by Ed Dorrell