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Mr Johnson had five sons, two daughters and several grandchildren.

The four have now marked the rare double platinum anniversary together, this time with their children, grandchildren and great-grandchildren for company.

“Secondly, they have certain expertise. We have employees that have been there for 50 years. Their children and grandchildren are there.”

In the short term, they are planning their "huge" annual Easter egg hunt - in which their children, grandchildren, and former foster children will take part.

When Fileto got custody of her three grandchildren last year, she said they were so malnourished that their bones were showing.