Woolwich also stocked a surplus of N class bogie components .
These were bought by the Southern for rebuilding the LB&SCR E1 class 0 - 6 - 0 tanks into the E1R class 0 - 6 - 2 tanks .
Woolwich also stocked a surplus of N class bogie components , and these were bought by the Southern for rebuilding the LB&SCR E1 class 0 - 6 - 0 tanks into the E1R class 0 - 6 - 2 tanks .