New rules to alter EU regulations for public sector procurement have been debated by MPs in order to help UK security.
The Procurement Bill, which is at the report stage in the House of Commons, makes it easier for UK firms get contracts for government-procured goods and services.
The market is worth £300bn a year.
A statement said: “The reforms proposed in the Bill will help mainstream innovation and innovative practices, improve the quality and efficiency of public services, and drive growth locally and nationally.
“The Bill also introduces new rules to help the government procure in emergency situations to ensure that contracting authorities can act quickly and transparently to buy vital goods.
“The simpler and more flexible rules take advantage of freedoms now that Britain has left the EU, as well as strengthening the ability to exclude suppliers who may have previously underperformed on government work.”
Minister for the Cabinet Office and Paymaster General Jeremy Quin said: “Protecting the nation’s security has always been the government’s number one job.
“These new measures will protect our sensitive sectors from companies which could threaten national security and are a firm deterrence to hostile actors who wish to do Britain harm.
“This builds on the robust rules within the Procurement Bill to hold suppliers to account and ensure that the taxpayer is protected.”