HMS Queen was a member of the London class of pre-dreadnought battleships built for the British Royal Navy. The Londons were near repeats of the preceding Formidable-class battleships, but with modified armour protection. Due to slight differences between Queen and HMS Prince of Wales and the other Londons, they are sometimes referred to as the Queen class. The ship's main battery consisted of four 12-inch (305-mm) guns, and she had top speed of 18 knots (33 km/h; 21 mph). The ship was laid down in March 1901, was launched in March 1902, and was completed in March 1904. After commissioning in April 1904, she served with the Mediterranean Fleet until 1906, when she returned to Britain before embarking on another stint with the Mediterranean Fleet later that year. Queen was transferred bac