Cable trough with an integrated walkway function for use in railways

A combined cable trough and walkway (1) comprising a trough (200a) and a lid, the trough (200a) comprising two trough units (200) arranged to be coupled together end to end to form the trough (200a), such that each trough unit (200) has a width identical to a width of the trough (200a) and a length equal to half of a length of the trough (200a) and wherein the trough (200a), comprising the two trough units (200), is arranged to be coupled to one or more further troughs (200a), each of the one or more troughs (200a) comprising two further trough units (200), wherein a connection between the two trough units (200) is of a different type to a connection between two adjacent troughs (200a).