Thank you for your advice.
The dressed carcase weight recorded at the slaughterhouse I use is always quoted as warm weight less 1.0 to 1.4kgs dependent on actual weight (rounded up to the nearest 0.5kg). Kidneys are always removed on the production line.
I can understand that some fat has been removed on the 22kg R3H, possibly why that carcase has lost 1.2kg more, but the 19kg U3L is what we used to sell as a prime Waitrose Welsh Lamb carcase.
Leg bones have been trimmed, tail bone removed and neck cut level with the shoulder, but the aitch bone is still attached.
Each pack consisted of the following:-
2 leg joints halved but not deboned
2 shoulder joints halved but not deboned
12 double chops, spine is intact but the ribs have been cut out
2 breasts rolled but not deboned (lower parts of the ribs are intact)
No steaks, diced meat, burgers, sausages or mince