Peter Lawrence's involvement comes after police announced in January that the investigation efforts into his daughter’s suspected murder would be scaled back.
Retired solicitor Peter, 75, expressed his disappointment but vowed never to give up searching for Claudia.
Close my eyes, I think of you, Until the day I see you again. The appeal, Find Every Child, aims to raise money so the charity Missing People can reach out to the thousands of youngsters who disappear each year.
The song includes the lyrics: ‘I never thought I’d be without you.
I always thought you’d be here safe with me.'Maybe tomorrow I’ll wake up to find you.'Lee was just 15 when he disappeared and his parents Peter and Christine have been seeking an explanation ever since.
Please help this wonderful charity in their ambitious goal to Find Every Child.'Madeleine, three, vanished from a holiday apartment in Portugal's Praia da Luz nearly 10 years ago in May 2007.
Mrs Mc Cann and her heart doctor husband Gerry, both 48, from Rothley, Leicestershire, believe their daughter – who would now be aged 13 – could still be alive.
Together, the mothers - united it grief over the loss of their daughters - highlighted the plight of 140,000 youngsters who go missing in Britain each year.
Mrs Mc Cann then made an impromptu speech in which she urged the public to give their support.'When my little girl first disappeared, on that horrendous night that changed our lives forever, I could never have imagined that nearly 10 years later we would still be in the same position.'That I would be stood here in front of you tonight talking about the issue and how important it is that we look for each and every missing child.'Giving hope is what Missing People do day in and day out.
Families searching for lost loved ones reduced Britain's Got Talent judges to tears as a choir for a charity fronted by Kate Mc Cann gave a heartbreaking secret audition.
Among them was the sister of missing Manic Street Preachers guitarist Richey Edwards, who disappeared 22 years ago today, the father of chef Claudia Lawrence, and the family and friends of murdered schoolgirl Alice Gross, 14.
Despite nearly 9,000 potential sightings across the globe police have struggled to unearth any new clues.