Ms May's reaction has been to shift the focus back to Brexit and away from domestic issues, which have dominated the headlines in recent days.
"If we get Brexit right, I am confident that that future will be bright. As we pursue a bold and ambitious free trade agreement between the UK and the European Union - and as we get out into the world to do new trade deals with old friends and new allies around the globe - the opportunities for our economy will be great," she said.
"We have already started discussions on future trade ties with countries like Australia, New Zealand and India. While countries including China, Brazil, the US and the Gulf States have expressed their interest in striking trade deals with us as soon as they can," the Conservative Party leader said. With just one week to go to the polls, Ms May has come under fire for her refusal to join a live television debate on Wednesday and used her campaign speech in Teeside in the north-east of England today to try and win back some of the lost ground.
She sought to raise the spectre of a hung Parliament that could require the Labour party to stitch up an alliance with the Scottish National Party (SNP), among other smaller parties.
She said, "He (Corbyn) doesn't believe in Britain. He doesn't have a plan. He doesn't have what it takes. And after last night [Wednesday's TV debate] 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 negotiate a deal for Britain in Europe, but on trying to stitch up a deal with [SNP leader] Nicola Sturgeon and the rest".
Ms May had announced early on that she did not intend to attend any of the televised debates and would be focussing on door-to-door campaigning. However, her failure to attend has faced widespread criticism.
Despite having repeatedly said that she intended to follow the UK's Fixed Term Parliament that would have seen the next general election held in 2020, Ms May had called a snap poll in order to win a strong mandate for negotiations over Britain's exit from the European Union (EU).
The Opposition Labour party, which was against Brexit but has accepted the June 2016 referendum result, has said its Brexit focus would be to fight to protect workers' rights, environmental protections and access to the single market for UK business in Brexit talks. The Liberal Democrats are also focusing on Brexit, warning of serious staff shortages in the state-funded National Health Service (NHS) caused by EU nationals leaving the UK.