Alzheimer's is frightening prospect for many of us - and it's getting closer as the years go by with all of us knowing someone impacted in some way. I'm taking part in this sponsored walk with some of my lovely friends from when we were language students together at the University of Surrey in the late 70s. Some of our knees and feet could find this quite a challenge on the hard London streets but planning to make sure we all get to the end together with as few blisters as possible!