Step 1: Understanding the concept of Assault.
Assault occurs when a person intentionally creates an apprehension of imminent harm or violence in another person’s mind, even without physical contact. The essential element is the threat of immediate harm.
Step 2: Application to the case.
Mr B and his workmen surrounded Mr A and threatened to harm him if he did not leave. Though no physical contact occurred, the threat and intimidation created a reasonable fear of harm — fulfilling the condition of assault.
Step 3: Conclusion.
Thus, Mr A can file a case against Mr B for assault.