Keir Starmer said that fixing the Brexit deal is part of his plan for growing the economy.
The UK Labour leader said in a speech at the UK Finance trade body in central London that a "fixed Brexit deal" and "a reset relationship with the EU" were part of his plans for growth.
Starmer set out his five "missions" for a future Labour government last week.
The first of these was a promise that the UK would have the highest sustained economic growth in the G7 by the end of Labour's first term.
He fleshed out this plan in the speech on Monday morning, saying that "unlocking power in every community" was part of it.
He said that he wants "Five shifts in Britain’s growth model.
"From chaos to certainty. From hoarding potential to unlocking power in every community. From lagging to leading - on science, technology, green growth and the opportunities of tomorrow.
"A labour market that moves from too many insecure jobs to good work for all.
"And a Britain that is resilient to global shocks and open to global trade.
"In each of these five areas we have three clear commitments – 15 first steps on the path to national renewal.
"Steps like our modern industrial strategy - that will get everyone around the table, remove barriers to investment.
"A Green Prosperity Plan that will provide the catalytic investment needed to become a clean energy superpower.
"A more powerful British Business Bank that will support start-ups to grow and scale.
"More flexible skills training for apprenticeships and the short courses which can train coders and programmers in weeks.
"And a fixed Brexit deal – a reset relationship with the EU - for the whole country, not just Northern Ireland."
He also vowed to reverse "the path of decline the Tories have set us on."
He said that working people had been made to pay for "the mess made" by those in finance.
Starmer said: "We do need to be frank about the path of decline the Tories have set us on.
"It’s not just the chaos of the past 12 months, there’s also the 12 years that went before it.
"The austerity which has gnawed away at our growth potential.
"Placed the mess made – let’s be blunt – in this part of this city onto the shoulders of working people.
"12 years where ‘trickle-down’ and ‘trickle-out’ growth strategies failed to deliver a better future for them.
"12 years where other countries sped past us in the race for the opportunities of tomorrow."
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