Operation: Covert Sword

Nigel Palmer, once an SI5 operative, has gone rogue. Using inside information, he and a group of mercenaries calling themselves The Plague have seized control of UNS Steadfast, an Orion Class Battle Cruiser armed with 6 Nuclear missiles. Palmer, using the pseudonym Agent Malice, claims he has the missile launch codes and intends to attack London starting World War 3. Your mission is to covertly board the ship and use every possible avenue to slow her down and stop her getting within range of her target, disable Palmer's men and lock down the ships systems. You need to buy enough time to get to her missile bay and stop the launch.