Chancellor George Osborne has declared his commitment to fight for "full employment" in Britain.
Speaking to workers at Tilbury Port in Essex, he said his "ambition" was for Britain to achieve the highest employment rate of any of the developed nations of the G7.
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An easing of lockdown restrictions in England has seen some pupils return to schools and queues form at stores.
The call by Water UK comes after an exceptionally dry and sunny May in England.
Current plans would mean all international arrivals would need to self-isolate for 14 days from June 8.