Police are "increasingly concerned" for aman with no money who has been missing for over two weeks.
Sydney Piper, 69, was last seen entering Lloyds Park in Walthamstow through the Forest Road entrance on February 23 at 11.50am.
He has not been seen since, but it is believed he may not have travelled far from the area as he has no money on him.
Sydney is described as 5ft 7ins tall, of slim build, with a grey beard and black short hair. He was last seen wearing a long black coat, grey T-shirt, grey trousers and black slippers.
Police say he also has a distinctive way of walking, with his feet splayed outwards, which people may have noticed.
The disappearance is considered out of character.
An appeal was released by the Metropolitan Police earlier this month, but a reappeal has been made after no progress.
Detective Chief Inspector Seb Florent, from the missing person unit in north-east London, said: "More than two weeks since Sydney has been spotted, we are increasingly worried about his wellbeing.
"With no money or Oyster card, we believe he is unlikely to have been able to travel far.
"We are now asking those in the Walthamstow area to please check any sheds, outbuildings or overgrown areas.
"Specialist officers have carried out searches of the park and we continue to recover CCTV from the area.
"We also need to hear from any people who use the park who may spotted Sydney over the past two weeks."
Anyone who has seen Sydney is asked to call police on 101 quoting reference CAD 4957/24Feb.
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