IWJS, an operating business of M Group Services, has signed contract extensions to
continue delivering essential works at Heathrow Airport and Addenbrooke’s Hospital.
At Heathrow Airport, IWJS will continue in its role as Tier 1 drainage supplier, delivering
corrective and planned maintenance on drainage systems in terminals 2, 3, 4 & 5. This will
include maintenance on landside and airside drainage systems across the airport, including
petrol and oil interceptors, pump stations and all foul and surface water drainage systems.
The contract includes 24-hour emergency response, with a two-hour response time
The IWJS team at Iver has been servicing Heathrow every day for the past seven years. The team was recently voted as contractor of the month following the successful installation of a difficult repair to the fire main.
We are also pleased to announce a five-year extension to continue delivering site drainage
maintenance and repair services at Addenbrooke’s Hospital in Cambridge.
IWJS has been providing these services for the past eight years, bringing our partnership to
a total of 13 years working together when this contract ends in 2027.
The core scope of works for IWJS will include planned preventative maintenance, site
surface drain jetting, including foul drains and radioactive drains.
Peter Maasz, IWJS Business Development Director, said: “We are delighted to have been
awarded these contract extensions by two of our long-standing clients. The awards are
testament to the continuous commitment of our people to deliver high-quality, essential
works which are crucial to the successful operations of both Heathrow Airport and