The family of a pensioner who went missing from her home four days ago are "extremely concerned" for her wellbeing.

Elizabeth Stevenson, who has sight problems and suffers from Alzheimer’s, was last seen at her home in Perthshire at 2pm on Tuesday.

The 77-year-old went missing from Aldour Gardens, Pitlochry, and she was last seen heading northwards on Atholl Road near to Dysart Brae.

On Friday, her family released a statement appealing for information in tracking down Ms Stevenson.

They said: "We are very worried about her and would appeal to anyone who might have seen her to contact Tayside Police with any information they may have that could lead to her safe return. The last confirmed sighting of Elizabeth was in Pitlochry on Tuesday afternoon.

"Known as Bett by friends, she is a popular members of the Pitlochry community and is regularly seen walking in and around the town. She is a friendly outgoing personality which might on first impression mask the fact that she suffers from Alzheimer's and has a significant visual impairment.

"Elizabeth is a much loved mum and gran who is eagerly awaiting the birth of her first great grandchild. She is extremely vulnerable and her family together with Tayside Police and other agencies involved in her care are extremely concerned for her wellbeing."

Tayside Police officers have been speaking with residents, workers and motorists in and around the town as they try to trace the pensioner.

Inspector Maggie Pettigrew said: "We are increasing concerned about Bett and would urge anyone who was in the area of the A9 at Faskally just north of Pitlochry or on the Pitlochry to Killikrankie Road around 2.30pm on Tuesday to contact us."

Ms Stevenson is 5ft 4in, slim, with blue eyes, and red hair. When last seen she was wearing a lightweight beige jacket, grey trousers and black boots.

Anyone who knows where the missing woman is or who has information that could assist Tayside Police in tracing her should call 0300 111 2222.