The 50HLGE is a fan-assisted oven, which means that the heat will be evenly distributed around the entire cavity, to create an even temperature & keep flavours from intermingling. Fan assisted ovens work by drawing in & distributing the air through vents inside the cavity that allow all the air to be wildly blown around the cavity rather than being forced to rise.
There is a Flame Safety Device installed for added safety, this device is designed to detect if the flame goes out on your hob & will cut off the gas supply immediately.