Guide dog owners are being illegally denied access to services and leisure facilities such as restaurants, new research has revealed.
Complaints have "rocketed" in the last few months, rising by more than a third since last year, said the charity Guide Dogs.
Guide dog owners are being refused access to shops, cafes, transport and other venues when going about their daily lives, a study found.
The largest number of reported incidents involved eateries, with restaurants the worst offenders.
The report, which takes into account almost 400 complaints received by Guide Dogs, showed that public transport was the next biggest offender with taxis drawing most complaints.
Richard Leaman, chief executive of Guide Dogs, said: "More awareness is needed to avoid blind and partially sighted people having to cope with this stress and discrimination in their daily lives. Although business owners are often eager to comply when we speak to them, our report shows that the situation is very different on the ground.
"Our research takes into account proactive complaints we have received, meaning the findings we have here could represent just the tip of the iceberg when it comes to everyday experiences of the community. We feel that more of the problems come down to poor training or ignorance of the law, and call on all organisations to ensure guide dog partnerships are welcome everywhere, anytime."
The report was published ahead of Guide Dogs Week (October 5-13), which aims to raise awareness of the challenges faced by guide dog owners in getting around with ease.