French-style quotas could be required to rescue British pop after homegrown talent suffered its worst ever showing in the six-decade history of the British singles chart.

The home of The Beatles has been squeezed out of the weekly official download chart, which is now dominated by United States R&B/rap and European dance music acts.

The only British representative in last week's Top 10 was Lauren Bennett, a Kent-born guest vocalist on the American act LMFAO's Party Rock Anthem.

The situation improved a little this week with a new entry at No 8 from British girl group The Saturdays. But the only other British act in the entire Top 20 was Jessie J.

Including the inevitable presence of Lady Gaga, British artists had to cede ground to the Dutch producer Afro Jack, Italian Benny Benassi, French DJ David Guetta, the Swedish House Mafia and Nicki Minaj from Trinidad and Tobago.

British pop was even outsold by its Romanian equivalent. The Romanian female singers Alexandra Stan and Inna both enjoyed British top 20 hits.

"It's the worst presence in six decades since the pop chart began," said Paul Williams, head of business analysis at Music Week. "The singles chart now resembles the Eurovision scoreboard. We used to face a musical challenge from the US but now it's from dance acts on the Continent too."

Although Adele is flying the flag for British music abroad, the predominantly youthful downloaders whose tastes decide the singles chart, have turned against genres like rock, where Britain has traditionally enjoyed success.

Williams said: "The music in the chart 20 years ago was much more varied. You would have a mixture of rock, soul, alternative, pop and MoR tracks. There's little sign now of the Brits taking back control of our charts."

Radio 1, which scored a record audience of 11.8 million listeners last month, remains the most important influence on the singles chart. The station has been accused of favouring "urban pop", at the expense of other genres, in order to attract more teenage listeners. George Ergatoudis, Radio 1's head of music, said: "This is symptomatic of Britain's music cycle. Five years ago UK guitar bands ruled the roost. Now dance music has made a return. The public will get bored with the current dominant sound and something else will take its place."

Ergatoudis said Radio 1 took its responsibility to support British music seriously. "You'll find indie, dubstep, R&B, dance and pop on the playlist every week, irrespective of their chart potential. However, we don't have any responsibility to increase the presence of UK artists in the chart - that's entirely up to the public."

He added: "Right now, there isn't a distinctively British pop sound but the UK is definitely a hot bed of creativity. Dubstep originated here and is having a global influence. The UK is brilliant at throwing up distinctive talent like Adele, Mumford & Sons and Florence and the Machine who are all enjoying global success."

One extreme measure which could help rebuild sales of British singles is a quota of homegrown music on radio stations. A 1994 French law required stations to play 40 per cent of its songs in French and half from new artists. Williams said: "It would be a terrible admission of defeat if we introduced French-style quotas to give British pop artificial support. UK music ought to succeed on its own merits."

Radio 1 already ensures that at least 40 per cent of the music it broadcasts on daytime is by British acts and that 45 per cent of its musical output is "new". British rock has a chance to break into next week's Top 10, when Coldplay release their comeback single, Every Teardrop Is A Waterfall, as a download this weekend.