The family of a girl who went missing more than 31 years ago are marching to Downing Street today to raise awareness of her case.
Katrice Lee was last seen in a supermarket in Paderborn, Germany on 28 November 1979. She was aged two at the time.
Today would have been her 33rd birthday.
Mark Heslehurst has been speaking to ITV about his 500 mile walk from Teesside to Westminster and back as he campaigns to bring his young son back home from Cambodia.
Mark Heslehurst has arrived back in Middlesbrough after his 500 mile walk to Westminster and back to ask for the Government's help to bring his son back from Cambodia to Teesside.
Mark Heslehurst handed in a 100,000 signature petition in his fight to bring nine-year-old Edward back from Cambodia, where he was taken by his French-Cambodian mother two-and-a-half-years-ago.
The father from Teesside met politician Lord Bates and the Mayor of London Boris Johnson outside 10 Downing Street. He is hoping his actions will trigger a debate in parliament and get him the help he needs.
Mark has walked from Middlesbrough to London and back again and is due to return to Teesside around lunchtime. He has also received a letter from the Prime Minister promising to look into the case.