Byrne Group will replace Dunne Group on the construction of the 100 Bishopsgate and One Blackfriars projects after the firm went into administration earlier in the week.

The prevent the schemes from being delayed, Brookfield Multiplex, which has used Dunne Group’s services on a number of schemes, is understood to have wasted no time in securing a replacement contractor to carry out the work.

At the 100 Bishopsgate project, Dunne Group had been on a deal worth £36 million over 92 weeks to provide concrete superstructure and substructure works.

It is understood that Byrne Group has taken on the deal from Dunne Group, along with a number of its staff, while sources have claimed that the slipform manager and project manager have left the 100 Bishopsgate scheme.

Meanwhile, at the One Blackfriars project, the contractor had been developing a 50 storey post-tensioned tower off podium level with inclined in situ columns including the central core.

The substructure work had been carried out by Laing O’Rourke’s Expanded business, however Dunne Group took on the superstructure work for Brookfield Multiplex.

It is also understood that work has ceased at Newington Butts as Mace looks for a replacement for the site after Dunne Group’s exit.

This may mean the appointment of a replacement contractor for the scheme or Mace directly employing workers from the Dunne Group to complete the job.

It is understood that Mace will make a final decision on this next week, once it has spoken to the administrator.

One source said that suppliers are looking to reclaim equipment while Mace is still deciding the best way to replace the Dunne Group on the project.

It is understood that the Dunne Group paid approximately £1 million for the piping and pump equipment at 100 Bishopsgate and that the assets of the group would “surely outweigh its debts.”