sentences:  Many train companies use alternative names for the role (conductor, senior conductor, train manager), but the role is mostly the same regardless of operator.On the UK light railways and tramways, conductors have all but disappeared in an operational sense and now the term 'conductor' is commonly used for revenue and customer service staff.Historically 'operational' conductors were the 'norm' on all systems including the London Underground (who used the term 'guard' like the mainline railway).