Mepụta nsụgharị dị mgbagwoju anya nke ahịrịokwu a Ebumnuche nke Class 156 bụ ihe na-echekwa ihe karịa Metro Cammell's Class 151 mbụ.
N'ezie, nsụgharị dị mgbagwoju anya nke ahịrịokwu ahụ bụ "Nhazi nke Klas nke 156 bụ ihe na-echekwa echekwa karịa Metro Cammell nke mbụ nke Klas nke 151, a na-eji ígwè eme ihe kama Aluminium, na nhazi ụlọ ahụ yiri nke BREL Class 150 iji mee ka nnabata nke Union dị mfe. "