Leander G was designed by Claus Kusch, who had previously designed two yachts named Katalina for the original owner, Brigadier Sir Timothy Landon. Her steel hull hull has a bulbous bow, a classic canoe stern, together with a helicopter deck and topped by a three deck aluminium superstructure - six decks in total. She has a range of communal guest areas including a Main Saloon and Dining room on her Main Deck, a Boat deck saloon, Jacuzzi Deck, Observation Deck and Study, a Fitness room, a Dive Room and Swim Platform. There are 10 suites in total, consisting of two Master suites with office/study and a forward facing saloon, 3 double guest cabins with en-suite bathrooms and 5 twin guest cabins with bathrooms. In all, she can accommodate 22 guests as well as a crew of 23.
The yacht was ordered in October 1990 by Brigadier Sir Timothy Landon from the former East German shipyard Peene-Werft at Wolgast to replace his yacht Katalina, his second of that name. After shipping to a Hamburg shipyard for outfitting, the arrangement of the interior accommodation was undertaken jointly by English designers Katalin Landon & Pauline Nunns Associates, and interior decorator Heinz Vollers of Hamburg. Part way through outfitting, Timothy Landon decided to keep his existing Katalina, reportedly due to ill-health, and sold the yet-unnamed vessel to former Royal Navy national serviceman Sir Donald Gosling, who took over the final stages of the build at what was described as an excellent price. Gosling (who coincidentally had later owned Landon's original yacht Katalina of 1992) named the yacht after the cruiser HMS Leander, the first Royal Navy ship in which he served.
She was refitted in 1998 and 2001.[4]
Leander G habitually flies the British White Ensign as her owner is a member of the Royal Yacht Squadron, but the Red Ensign is flown when chartered