Possible Clues:

• Providing essential information
• Local barman at home for great session
• Information exchange that shouldn’t take long?
• Press event
• Preparation of cheese with some fish before midnight
• Instructions for aircrew, say, that's done by barristers?
• Info that is primarily for opening present
• Session to give information or instructions
• Giving information involving cheese and fruit's nitrogen content
• Information about Cockney's obsession with cheese?