The cost of the works is now estimated at £95m for the Victoria Tower Fabric Safety Project.
A maximum of five suppliers will be shortlisted to qualify for the Invitation to Tender stage, which is anticipated to commence in September with the works planned to start in late 2024.
One contractor will be appointed under a single-stage contract to deliver two phases of work. Phase 1 is to complete temporary works, with subsequent conservation and repair works in Phase 2.
Significant repairs were last undertaken to the 99m-tall tower in the early 1990s but the exterior masonry of Victoria Tower is now deteriorating and represents a health and safety risk.
For full details of the contract click here.