Alyson, aged 52, was last seen in central Portsmouth at around 5pm on Sunday, July 10
She is believed to have visited the Southsea seafront area.
She is described as: 5ft 6ins, of large build and red hair. She was last seen wearing a blue and white stripy dress. She uses a mobility scooter.
Together with her family police are growing increasingly concerned for her welfare.
Officers have issued a photo of Alyson to help trace her, however, since this photo was taken she has dyed her hair red.
Have you seen Alyson since she was last missing?
Have you noticed an abandoned mobility scooter?
If you think you’ve seen Alyson or think you might know where she is, please call police immediately on 101 quoting 44220276456.