The Enquirer understands that prequal documents are due out next month.
Construction will transform the two acre riverside site in the Nine Elms regeneration area between Vauxhall and Batteresea
Work will involve building twin towers of 45 and 60 stories including a 160-room, five-star Wanda hotel.
One construction source said: “This is a big one to win and all the major players are now gearing-up to have a crack at it.
“I’m sure you’ll see big names like Laing O’Rourke, Carillion, Brookfield, Lend Lease and Sir Robert McAlpine on the lists.”