The organiser of the event or a designated person should meet the Mayor on arrival and accompany him throughout the event. The Mayor's correct title is "The Right Worshipful the Mayor (of Lisburn City Council), Councillor Brian Heading."
After initial introductions, it is correct to address the Mayor as "Mr Mayor."
The Mayor is the first citizen of Lisburn City and in any formal seating arrangements (dinners etc); the Mayor should be seated on the immediate right of the host or chairperson.
This only varies if a Member of the Royal Family or the Queen's Representative is present - they would be given precedence over the Mayor.
It is important, when inviting the Mayor to any function, to make it clear what his role is to be and why he has been invited to the event. When speeches are made, the Mayor should be addressed first.