British television programmes such as Strictly Come Dancing, Sherlock and Britain's Got Talent are under 'serious threat' from streaming services such as Netflix, BBC director general Tony Hall will warn.

Lord Hall, 66, is concerned the home-grown shows could suffer because of a potential £500million shortfall over the next decade.

He will claim that the rise of popular streaming services such as Netflix and Amazon has had an impact on British television after the corporation made cuts.

During a speech in Liverpool later today, he will caution that the global streaming services are failing to invest their revenues in British programming.

British television programmes including Strictly Come Dancing (pictured, Alexander Burke and Gorka Marquez in October) are under threat, according to the BBC

BBC Tony Hall is also concerned about the hit BBC show Sherlock, which stars Benedict Cumberbatch (pictured)

Worrying findings by consultants Mediatique - published by the BBC - suggested spending on UK programming could fall by half a billion pounds over the next 10 years.

Lord Hall will say: 'We have to face the reality that the British content we value and rely upon is under serious threat.'

Global services such as Netflix and Amazon are showing little evidence they are likely to make up the shortfall, according to Lord Hall.

He will say: 'The reality is that their investment decisions are likely to focus increasingly on a narrow range of very expensive, very high-end content - big bankers that they can rely on to have international appeal and attract large, global audiences.

'Even the most generous calculations suggest they are barely likely to make up half of the £500million British content gap over the decade ahead. And a more realistic forecast points to substantially less.'

Netflix reportedly spent £100 million on the first two seasons of The Crown, which returns for its second series later this year and chronicles the life of Queen Elizabeth II.

The Mediatique report also suggests that while Sky and BT may have spent huge amounts securing British sports rights, they do not do much to fill the funding gap across other genres or areas such as religion or science and history.

It warns of a damaging impact on UK distinctiveness, risk-taking and innovation.

So far this year, the top five shows are all British: One Love Manchester, Broadchurch, Britain's Got Talent, Sherlock and Strictly.

In the face of the warnings, Lord Hall will call on the BBC to remain a 'bastion of brilliant British content'.

So far this year, the top five shows are all British: One Love Manchester, Broadchurch, Britain's Got Talent (pictured), Sherlock and Strictly

Lord Hall will say Netflix (pictured, CEO Reed Hastings) is showing little evidence it is likely to make up the shortfall

He will say: 'But to achieve this, we have to recognise that the environment around the BBC has changed dramatically, and we must change in response.

'In the UK we often think of the BBC as a big player, but today the media market is truly global. And in that vast solar system, we are tiny compared to the huge gas giants of the US. And every day they're getting bigger.

'That is why we must continue to innovate, back new ideas, and take creative risks. We will never simply compete on money alone. It is why the reinvention of the BBC for the modern age is so important.'

Lord Hall will highlight the corporation's launch of commercial production arm BBC Studios - which produces programmes for other broadcasters as well as the BBC - and its challenge to BBC Worldwide in doing more to generate returns for licence fee payers.

He will say a 'new golden age for British production' can be kick-started if the industry gets the response right now.