This is the low pressure return hose from the brake accumulator sphere and valve to the brake reservoir. There are two of these hoses per car on the series 1 models (before VIN 30000). From VIN...

This is the high pressure steel braided hose from the front brake accumulator to the body of the car. Only fitted to Early Shadow I and T1 models (prior to VIN 30000)

This is the Rear high pressure accumulator hose.    1966-1980 Silver Shadow, T-series, Shadow II, T-2, Silver Wraith II