Trade Marks Regulations 2003

the name and address for service of the opponent:

if the opponent has an agent, the agent’s name:

the number of the application:

the class or classes, or the goods or services, to which the opposition relates:

the ground or grounds of opposition and the provisions of the Act to which those grounds relate:

if a ground of opposition relates to section 25 of the Act, the trade mark numbers of the earlier trade marks.