Mr Cameron yesterday returned to the UK after a family holiday in Lanzarote, while Business Secretary Sajid Javid has been forced to cut short a trip to Australia amid the crisis.
The Government has been criticised for failing to send any minister to Mumbai to lobby Tata executives ahead of this week’s crunch board meeting, after which the company made their announcement.
But the Prime Minister denied accusations the Government had been caught behind the curve and without a plan.
Pointing to efforts to make sure British steel is used to build ships and measures to cut energy costs for steel plants, Mr Cameron said: “We have had a plan and we’ve been working to that plan.
“We’ve had teams of ministers working on procurement, working on cutting energy costs, working on making sure we act properly in Europe, making sure we work with the company.
“One of the things we were concerned about was that there might have been an announcement of an outright closure [of the Port Talbot plant] and actually our intervention I think has helped to make sure there will at least be a sales process.
“Now we need to work very hard with the company, with the communities, with potential purchasers, recognising the British Government stands ready to do whatever it can to help in what is a very difficult situation.”