In a statement on the deal, he said PSA has made assurances over existing production runs at the plant which will mean jobs are protected until around 2021.
“Now the new owners are in place, clearly work must begin in earnest to put UK production in the best possible position,” he said.
Madders said that there has been “significant challenges faced in the past”, which have been overcome, and called for collaboration between union and management like in the past.
“There is no doubt that we have some of the most efficient plants in Europe so we have a good tale to tell and we should not underestimate the positive impact on sales that having a UK manufacturing base brings,” he said.
“There should be no doubt that one of the biggest selling points to UK consumers is that Vauxhall is a British brand that supports British jobs. That is something that I know will be stressed to PSA.”
Madders added that he will be meeting business secretary Greg Clark and will emphasising to him the need for the government to commit to doing whatever it takes to protect British jobs.
“With the country now facing new trading arrangements after Brexit this is the first test of the government's commitment to supporting UK manufacturing in the new world,” he said.
Union Unite has also vowed to fight for workers at the Ellesmere Port and Luton sites.
