Global MEP Limited director Danny Longland has been left fuming at his treatment on the prestige job.
Global started working on a £1.8m subcontract for Kershaw in March 2021 but left the job last December following a row over payments.
The case went to adjudication with the adjudicator finding in Global’s favour and ordering Kershaw to pay them more than £500,000.
But Kershaw went into administration just days after the ruling owing more than £10m to its supply chain.
While the adjudication process was ongoing Global had a 30ft storage container on the Vinci site for University College London at Poole Street.
Global was not allowed on site to claim back its materials.
But Longland was stunned to discover the container was broken into with Kershaw workers then using the materials on site.
The Enquirer has seen a series of photographs and videos showing equipment being taken by workers in Kershaw branded hi-vis vests.
Longland said: “Just when you think you’ve seen it all this happens.
“Not only have they shafted us for the money we are owed but they have then helped themselves to all our materials while Vinci just turned a blind eye.”
Vinci Building said: “Vinci Building has been made aware of an ongoing dispute between Global MEP Limited (Global) in relation to works it carried out as a sub-contractor for Kershaw Mechanical Services Limited (KMS) at the University College London project, Poole Street before KMS entered into Administration in April this year.
“With regard to specific comments about Vinci Building and access to the site, we can confirm that all access on and off our sites is controlled and managed to ensure the safety of all at all times. The storage container in question was removed from site in April
“For clarity, any ongoing issues between Global MEP, KMS and their Administrators, should be resolved between them directly.”