Dyfed-Powys Police is appealing for help to find Andrew, who is missing from the Brecon area.
Andrew, who is in his 50s, was last seen in Talgarth at around 10.20am yesterday (Wednesday, 25 August).
He is described as being of slim build, 5ft 6ins, with long, thin grey hair and a long grey beard.
Andrew was last seen wearing a black jacket and a grey and black shirt.
Officers believe could have travelled to the Ceredigion or even Cornwall areas.
Anyone who has seen Andrew, or knows of his whereabouts, is asked to report it to Dyfed-Powys Police, either online at https://