As found on service sheet 404, for the Adderley Hall R3170.
X6476 Hornby Spare Tender Chassis for Fowler Class 2P 4-4-0 R3028 R3209
X7023 Hornby Spare Tender Chassis Bottom For King Class R3330 R3331 R3332
Hornby X7022R Tender Chassis Bottom Underframe & Buffers For King Class R3331