4 April 2013, 07:12 | Updated: 5 April 2013, 12:48
The twin sister of a missing 32 year old Buckinghamshire woman last seen in Watford has told Heart she's worried her life could be in danger.
Penny Measey, (right) from hasn't been seen since just after midnight on Sunday 24 March 2013.
She is described as white, of slim build with long blonde hair. She is 5ft 6ins tall. She doesn't have any money or a mobile phone with her.
Penny's twin sister Katie, who lives in Watford, told Heart the family's lives have been put on hold while Penny is missing, and they're all in pieces.
She also says emotional problems Penny's got may be a reason why she's gone missing.
She said: "It's given me a lot of strength that there is so much support out there, but it's the night-time when you're laid in bed and your mind's ticking and all you can think is 'Where is she?' 'Where's she sleeping?"
PC Ben Dyke, leading the search said: “We are becoming increasingly concerned for Penny’s welfare as she has no access to money. We would urge anyone who knows of her whereabouts to contact us as a matter of urgency.”
Anyone with any information about Penny’s whereabouts is asked to contact Thames Valley Police on the 24 hour non-emergency number 101.
Watch Katie Measey's interview with Heart's Warren Lee