A cleaner at a private school for girls, who was caught with a large amount of cocaine and amphetamine in her home, walked free from court yesterday.

A jury returned majority not proven verdicts on charges that Ms Elaine Riley, 37, possessed the drugs worth #15,000 in her Aberdeen home with intent to supply.

Ms Riley said she did not know how the drugs came to be in her bedroom.

''I am an awful one for leaving the door open when I come home from work and go to the shop,'' she told the High Court in Aberdeen.

She was working as a cleaner at the private Albyn School for Girls when detectives swooped last June and found the drugs in her Logie Avenue home, the three-day trial heard.

She expressed surprise when police told her they had found drugs with a street value of #15,000.

She denied she was ''a mug'' who agreed to store over 435g of amphetamine and over 44g of cocaine, and maintained she knew nothing about the drugs.

Ms Riley wiped away tears of relief as trial judge Lord Macfadyen said she was free to leave the dock after the not proven verdicts.