In a speech in the North East of England today, the Prime Minister went on the attack in a bit to repair damage from a failure to turn up to the BBC TV debate last night, and a dip in the polls.
Setting out her vision of a "great national mission" of a fairer and more prosperous future outside the EU, Mrs May emphasised the benefits to be run from regaining border controls from Brussels to curb immigration and the opportunities that can be seized from becoming "a self-governing country" once again.
And she insisted only a strong government under her leadership can ensure that the opportunity presented by Brexit is not squandered.
She said: "You can't negotiate the right Brexit deal for Britain if you don't believe in Britain. You can't fight for Britian if you don't have confidence in our strengths and all we have to offer.
"You can only deliver Brexit if you believe in Brexit. You can only fight for Britain if you believe in Britain. You can only deliver for Britain if you have the strength the plan and the determination to see it through.
"And what we know from this election is the only other person who can be Prime Minister in seven days time is simply not up to the job. He doesn't believe in Britain. He doesn't have a plan, he doesn't have what it takes.
"And after last night it's clearer than ever that just 11 days after the election when the negotiations begin, Jeremy Corbyn's focus wouldn't be on trying to secure the best deal for Britain, it would be to stitch up a deal with Nicola Sturgeon and the rest."
Theresa May was speaking in Guisborough today
Her speech today marked a distinct switch in tone for the Tory campaign following criticism that the party's message has been excessively negative and gloomy.
She said: "The promise of Brexit is great – the opportunities before us enormous.
"I believe in the British people; I believe that with determination, ingenuity and common sense, we can use this moment of great national change to shape a better future for Britain."
The Prime Minister highlighted the potential benefit of Brexit
Get Quotes on Home Insurance
And the Prime Minister attempted to check Labour's recent opinion poll revival by returning to the touchstone issue of which leader is the best choice to steer the UK through the EU exit.
The promise of Brexit is great – the opportunities before us enormous
In her speech, Mrs May said: “We are now 12 months on from the EU referendum, 12 months since the British people voted for a brighter future for our country, 12 months since they voted to leave the European Union and embrace the world.
“And in one week’s time, they have the opportunity to affirm that decision and secure that brighter future by voting for me to continue as Prime Minister.
“If they do, I am confident that we can fulfil the promise of Brexit together and build a Britain that is stronger, fairer and even more prosperous than it is today.
Election 2017 LIVE Wed, May 31, 2017
Britain heads to the polls on June 8 for a snap general election. LIVE images as the campaign unfolds across the UK.
1 of 26
“Because the promise of Brexit is great – the opportunities before us enormous.”
Mrs May argued voters opted to build an outward-looking "global Britain" when deciding to Leave the EU in last year's historic in-or-out referendum.
“It is time to act on their decision. To deliver their will, to respect the decision of the British people and take Britain out of the European Union," the Prime Minister will say.
Jeremy Corbyn has closed the gap on the Tories in recent weeks
She added: “But I want to do more than that. I want us to work together to fulfil the promise of Brexit too.
“Because if we get Brexit right, then together we can do great things.
"We can build a Britain beyond Brexit that is stronger, fairer and more prosperous than it is today; a Britain beyond Brexit that is more global and outward-looking; a Britain alive with possibilities, more confident in itself, more united and more secure.
"She will promise that, under her leadership, the government can help to build "a country our children and grandchildren are proud to call home."
Mrs May said: “If we get Brexit right, we can be a confident, self-governing country once again, a country that takes the decisions that matter to Britain here in Britain.”
The Prime Minister will set out her Brexit plan to restore border controls so the immigration system can serve the national interest.
She also argued the country can regain control of billions of pounds of taxpayers' money every year by no longer paying "huge sums" to Brussels.
Instead, she argues the cash can be spent on the country's own priorities including the Tory manifesto proposal of a Shared Prosperity Fund to reduce the inequalities that exist between different regions of the country.
Snap election 2017: The pictures politicians may not want you to see Sat, May 27, 2017
Protests, fights and daleks, it's all happening as the politicians hit the campaign trail for the snap election
PA 1 of 48
Jeremy Corbyn during a visit to Hackney Marshes Football Pitches, to highlight Labour's manifesto commitment to ensure 5% of the Premier League's television rights income is diverted to the grassroots game, during a General Election campaign
She trumpeted the potential benefits of ending the rule of the European Court of Justice over British affairs and the freedom to forge new trade deals with friends and allies across the globe.
Mrs May said: “Set free from the shackles of EU control, we will be a great, global trading nation once again bringing new jobs and new opportunities for ordinary working families here at home.”
She also promised to use it to build a better country, saying: “For Britain to succeed we need to be ready to grasp the opportunities ahead, to make the most of every talent and ensure no person or community is left behind.
“And as we come together behind this great national mission – to make a success of Brexit and of the opportunities it brings – we will build a more united country as our shared values, interests and aspirations bring us together.
Mrs May will champion the idea of an outwardly looking global Britain
“This is the prize – the opportunity that is within reach – a stronger, more secure and prosperous nation, abrighter, fairer future for all.
“That is what excites me about the years ahead, what I am working towards, what motivates me to do what I do and put myself at the service of ordinary working people.
“And it’s what makes the decision you face next week so vital.”
She concluded: “This is my plan for Britain – a plan for Brexit and beyond. But the brighter future we want for our country will not just happen.
Theresa May said it was time to make the best of Brexit
“This great national moment needs a great national effort in which we pull together with a unity of purpose and – however we voted in the referendum last June – we come together with a determination to make a success of the years ahead.
“Because together we can do great things. And as I have said many times in the past, people can have faith in me because I have faith in them.
"I believe in the British people. I believe that with determination, ingenuity and common sense, we can use this moment of great national change to shape a better future for Britain. So this is the time to choose.”