The first named crew is on the Bucks Station
217) Walbrook (Kukula =G)┐
│ Marlow RC (Vere =H)
218) Marlow RC (Vere =H)──┐ Marlow RC (Vere =H) ├──────────────────────────
├──────────────────────────┘ NTT 2 lengths
219) Thames (Collett =H)──┘ NTT easily