Professor Robin Ali explains how a study on mice could help treat patients suffering from Retinitis Pigmentosa:
More top news
A main road in Birmingham is set to remain closed for the entirety of Sunday due to a "very serious" crash.
It will be a frosty start for many across the UK with slow-clearing mist and fog across parts of central and southeastern England.
The prime minister says she has proven the "doubters" wrong but still faces opposition from both sides of the Brexit line.