Self-employed musicians staged a performance in London's Parliament Square this week.
They wanted to publicise the damage done to the performing arts sector as a result of coronavirus.
And called on the government for more support over the loss of work.
With job losses on the rise in Britain, the economy struggled to grow in August.
Gross domestic product rose by 2.1% from July.
That wasn't even half the median forecast in a Reuters poll of economists.
And was the slowest increase since the economy began to recover in May from a record slump.
Much of what growth there was in August was down to a one-off government restaurant subsidy program.
Output from accommodation and food surged by 71.4% thanks to the government's one-month meal subsidies.
And more people took holidays in Britain with the easing of lockdown restrictions.
But as a second wave of COVID-19 infections hits, finance minister Rishi Sunak is expected to announce a plan to support jobs in businesses that may be ordered to close again.
Economists told Reuters that Friday's data raises the chance of more stimulus from the Bank of England.
One said that the "sharp slowdown indicates that the recovery may be running out of steam".
The British economy - which shrank by more than any other G7 nation between April and June - remained 9.2% smaller than its pre-the pandemic level.
Britain is also at risk of failing to secure a trade deal with the European Union.