Barry will start the Memory Walk, at Itter Park, in Gunthorpe, Peterborough, on September 19.
He said: "I was approached to start the walk and I was pleased to do it.
"The charity does some very important work."

The Peterborough walk is one of 90 happening across the country around the time of World Alzheimer's Day, on September 21.
One of those who plans to take part in the walk is pensioner Ray Smith (74), who has written a book about his life with wife Grace, who died two years ago after a battle with Alzheimer's.

The book, Amazing Grace, charts the couple's round-the-world travels and Ray's determination to use a holistic approach to treating her illness.
Since its publication, Ray has been interviewed in national magazines and radio. The book has been reviewed in the Sunday Telegraph and in medical journal The Lancet.

He said: "I recently walked from Trafalgar Square to Aldermaston with CND, so the walk will be no trouble for me."
This year sees the 25th anniversary of the Alzheimer's Society and is also 18 years since the Peterborough branch was set up.

The charity is urging people to enrol in the walk or to just go along to Itter Park and enjoy a family fun day which will take place.
There will be a shorter route which is suitable for all ages and abilities and also for buggies and wheelchairs.

In the afternoon there will be a chance to play tennis, bowls or pitch and putt.
The Deeping St James Majorettes are kicking off the walk with a warm-up display at 1.30pm and the walks will start at 2pm.
> To register for the walk call 01733 893583 or visit www.alzheimers.org.uk/memorywalk/peterborough to register.

Society cares for sufferers and families

The Alzheimer's Society provides helplines and support for carers, runs quality day and home care, funds medical and scientific research, and gives financial help to families in need.
It also campaigns for improved health and social services and greater public understanding of all aspects of dementia.

Dementia is a term used to describe various different brain disorders that have in common a loss of brain function that is usually progressive and eventually severe. There are more than 100 different types of dementia.
More than 750,000 people in the UK are affected by the condition.