Hms"Invincible Mr. Banks asked the Secretary of State for Defence if he will now publish the commissioning date for HMS"Invincible "; and when sea trials will begin. Dr. Gilbert "Invincible"is due to start contractors' sea trials in the middle of next year. As my hon. Friend the Under-Secretary of State for Defence for the Royal Navy informed the hon. Member on 16th November 1977β€”[Vol. 939, cc. 278–9]β€”it is not the normal practice to publish advance information, except for the current year, about the planned acceptance date of new ships.