we checked in with Essex Radar who fastidiously require the aircraft type, current ATIS confirmation as well as any current restrictions to be announced on initial contact, to be handed over to Luton Radar shortly thereafter, where I failed miserably to provide my aircraft type
You are not required to pass the aircraft type and current ATIS to Essex radar if you are a Luton inbound, you only need pass this to Luton Approach. Only SS inbounds are required to pass this to Essex.