​London, May 2 (IANS) Two of Britain's leading charities have announced their biggest ever donations for research to curb dementia.

The Alzheimer's Society and Alzheimer's Research UK on Sunday announced their biggest ever financial commitments to the cause, each pledging 50 million pounds ($73 million), Xinhua news agency reported.

The 100 million pounds will be added to the $220 million already announced by Prime Minister David Cameron to pay for Britain's first ever Dementia Research Institute.

The Medical Research Council also announced on Sunday the launch of a search for an outstanding scientist to head the new institute, expected to be an expert to drive forward world class research.

The new institute, due to open in 2020, will bring together scientists and experts from across the globe to transform the landscape of dementia, one of the biggest conditions facing the human race.

The research will help to drive new approaches to diagnosis, treatment, care provision and ultimately prevention of the disease.

Science Minister Jo Johnson said: "We want Britain to lead the way in tackling this terrible condition, and scientific research and understanding is crucial to this."

Government officials estimate that in 20 years the number of Britons suffering from dementia will be around 1.7 million, double the current figure.