Yes - I can refer you to someone for whom I have recently performed. I prefer to pass on telephone numbers, which enables you to discuss me and ask questions.
However I never pass on anyone's 'phone number without their consent. Therefore if you book me and are so pleased with my show that you would be happy to recommend me please let me know.
I have also voluntarily been Police-checked (i.e. I can show you a document to show I have no prosecution/conviction history). This is often required by schools and voluntary organisations for people working with children.