A virtual reality app has been launched to provide a sense of what it is like to live with different forms of dementia.

A Walk Through Dementia was created by the charity Alzheimer's Research UK.

It has been welcomed by other experts in the field.

"We will increasingly be asked for help by people with dementia, and having had some insight into what may be happening for them will improve how we can help," said Tula Brannelly from the University of Southampton.

A woman living with the condition and her husband told the Today programme why they supported the Android app's creation.