Shops are private property and should be allowed to refuse to serve people because of a Protected Characteristic? Rhubarb. All property is private property unless it's a government-owned building! What, so gay people should only be allowed in the Council offices?
OK then...along comes Mrs Bloggins who is a wheelchair user who wants to buy a loaf of bread. They go into the corner shop and say "A loaf of bread, please, Mrs Shopkeeper".
"S*d off - we don't want your sort in here - this is private property".
Hands up all those who want to live in that society?
The outcome of that is now anything up to a £200,000 fine on the business, by the way. (Latest case to go through the courts in Nov).
So yes, people can be prejudiced - we can all choose to break the law. I could nip out and rob a bank tomorrow "because I can", but the question is not whether I can, but whether it is right to do so. We know it's not right to rob a bank. It is against the law.
It is not right nor is it legal to refuse to serve people because they are disabled, black, or in a loving relationship with someone we personally don't approve of.
So, prejudice? Yup, it's out there - but let's hope they have plenty of cash to do it with, eh?