Banjo-Kazooie Nuts and Bolts Easter Egg - Developers Davy Jones Locker

When inside BanjoLand, you'll find that certain Acts will allow you to dive under the spot behind Boggy's Igloo found at the end of the manufactured lake.
Once you've dove down far enough into the depths you'll resurface in a large treasure room that's surrounded by lockers -- which is a reference to Davy Jones Locker. Look closely at the lockers however and you'll see some names have been scrawled through the dust like G. Kirkhope and G. Mayles.
These names belong to the creators of Banjo-Kazooie: Nuts & Bolts, with the examples given belonging to Grant Kirkhope and Gregg Mayles, a musician and designer respectively.