Quick coronavirus testing could enable nightclubs and theatres to reopen, Boris Johnson has suggested.

The PM said "rapid" lateral flow tests could be used by "those parts of the economy we couldn't get open last year".

"That, in combination with vaccination, will probably be the route forward," he told a Downing Street press conference.

But he stressed it was "still early days" with "lots of discussions still to be had".

A government source said: "There is a long way to go before we can get people back at big events safely."

Nightclubs have been unable to operate since the first Covid lockdown in March 2020, while many theatres have struggled to make social distancing work.

It comes as Mr Johnson said people must be "optimistic but patient" about an end to coronavirus restrictions in England.

He said steps taken to ease lockdown should be "cautious but irreversible" ahead of next week's release of a roadmap for lifting curbs.

Vaccines minister Nadhim Zahawi told LBC the government would rely on rapid testing and "making people access their own personal vaccination records" on the NHS app, rather than issuing vaccine passports.

Asked about measures to make it possible to attend cinemas and hospitality venues, he said vaccine passports were not best suited as "we don't know if an individual vaccinated can still transmit the virus" and said it was "much better to look at rapid testing".

Michael Kill, the boss of the Night Time Industries Association, said administering rapid tests will not be straightforward, even if it is the way venues like nightclubs are allowed to reopen.

He told the BBC that professionals would be required to administer swab tests outside the venue, where clubbers would need to wait for at least 15 minutes to get a negative result before being allowed in.

That would force venues to stagger admissions and have procedures in place to deal with positive cases and those who they come into contact with.

What are lateral flow tests?

Lateral flow tests have the major advantage of not needing to be taken to a lab to be processed, like the more expensive PCR tests used by NHS Test & Trace.

They work by dipping a nose and throat swab in special solution and then dropping that fluid onto a plastic stick - a bit like a pregnancy test.

During a testing pilot in Liverpool, the devices picked up two-thirds of the most infectious cases.

But the study found the devices only picked up 40% of all cases - fewer than expected.

The tests may miss people in the day or two before they are about to become infectious.

Mr Kill said allowing revellers to perform tests the day before or under the supervision of a professional over a video call could make the process less onerous.

Nevertheless, he welcomed Mr Johnson's announcement.

"Finally we have some acknowledgement from the prime minister and government on the existence of late night economy businesses, including nightclubs, theatres, casinos and late bars, particularly as they are some of the hardest hit since the start of the pandemic," he said.

Sacha Lord, who co-founded Manchester's Parklife Festival, said the events sector had been "shattered over the past eleven months", adding that any further delay to implementing initiatives such as rapid testing at venues would do "irreversible" damage to the UK's cultural sector.

"The night time and live music industry has been discussing the need for on-site rapid testing for over five months, and we have suggested this on multiple occasions to MPs and during Select Committee hearings," he said.

"My fear is that they take another five months to get moving, which the industry simply doesn't have."

The UK recorded another 9,765 new coronavirus infections on Monday, according to the latest government figures. It is the first time the daily cases figure has been under 10,000 since 2 October.

A further 230 deaths within 28 days of a positive test were also recorded. Fewer deaths tend to be reported on Mondays due to a reporting lag over the weekend.