The head office of Northgate Information Solutions, the software and outsourcing firm, has been seriously damaged by Sunday’s wave of massive explosions at the Buncefield oil depot near Hemel Hempstead.
Northgate said the fabric of its head office plus the fixtures and equipment inside were severely damaged, and back-up systems that were in place were also rendered inoperable.
Four Northgate staff members were injured by the blasts, but none seriously.
The closure of the head office affects around 400 Northgate staff. In the interim, its remote data centres and other offices around the country will be used to maintain services.
The European headquarters of 3Com, the networks specialist, was also damaged by the blast, but it has reported no injuries to staff.
The 3Com office was inaccessible on Monday and all staff were instructed to work from home.