A bungling robber tried to disguise himself by wearing a Londis plastic carrier bag on his head but made a large slit to see and didn't realise people could see him clearly.
Luke Martin, 28, from Hemel Hempstead in Hertfordshire, walked into two separate convenience stores on different days whilst wearing the gaping bag and brandishing a knife.
He walked into the Day One store on May 9 last year, which was packed with schoolchildren at 8.45am, and pointed the weapon at the woman behind the till, before making off with £88 in cash.

Disguised: Luke Martin, 28, walked into two separate convenience stores on different days wearing a plastic bag that had a slit in so he could see

Bungling: The robber brandished a knife at staff in both Day One and Bells Mini-Mart in an attempt to take cash
Then at 9.20am on December 18 he attempted to rob Bells Mini-Mart, whilst pointing the blade at a member of staff but this time he didn't take any money.
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Share 95 sharesMartin was arrested after TV's Crimewatch launched an appeal, showing CCTV of him wearing the useless disguise, and he appeared at St Albans Crown Court today.

Martin, of Hemel Hempstead, was arrested following an appeal by TV's Crimewatch
Prosecutor Will Noble told the jury: 'A weapon was produced and no doubt it was frightening for the staff. It was aggravated by the disguise, although it was fairly unsophisticated.'
Gwen Williamson, defending, said little or no force was used and in the attempted robbery he was pushed away.
She said he has difficulties with mood swings and becomes depressed, and needed the money because of a gambling addiction.
Ms Williamson added that Martin is remorseful and regretful.
Judge Stephen Warner told him: 'These may not have been sophisticated robberies but there was an element of planning and it was a frightening experience for both victims.
'The case has an aggravating feature in that you wore a disguise.'
At the time DC Paula Mowbray said: 'it is quite unusual for a robbery to be committed where the suspect uses a carrier bag as a means to attempt to conceal their identity.'
He was convicted of robbery and attempted robbery and jailed for a total of four years and nine months.

He was convicted of robbery and attempted robbery and jailed for a total of four years and nine months at St Albans Crown Court today (pictured)
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