P7 Hopper - Pre-Grouping: NER Grey - Triple Pack 1P7 Hopper 1911 1922 Pre Grouping: NER Grey Triple Pack 8 plank, 20 ton Diagram P7. Two types of end stanchion tooled: NER wooden or LNER metal T bar type from 1925 onwards. After 1926, the bottom sections of any remaining wooden stanchions were removed. Side chains were fitted to NER Northern Division examples until 1916 and have been catered for. Two type types of axle box tooled: S4 double axleguard (10" x 5") covering 1909 to 1912 and No. 3 (10" x