Concerns are growing for the welfare of a 55-year-old man described by police as “vulnerable” who has been missing since yesterday afternoon.

Peter Safe, who police said had links to Stevenage, was last seen in Watford’s Gammons Lane at 2.30pm yesterday.

Officers think he could be in the Heathrow or Luton area, and said he often visits railway stations to do trainspotting. Police added that he also often visits local hospitals.

He is described as a very slim white man, 5ft 5in tall, with short dark grey and white hair. He was last seen wearing a white shirt with blue stripes, a cream-coloured jumper, a blue coat and light brown/grey trousers, tan/brown shoes, and a green woolly hat.

Anyone who has seen him or has any information about his whereabouts should call Herts police on 101, quoting ISR 471 of March 28.