Back in 1973, Class 47 1614 runs light engine from Holyhead, carrying code 0Z00 - indicating that it was returning to depot - probably Crewe.

Seen at a Crewe Works Open Day in 1975, 47137 is ready for a return to traffic, complete with an appropriate headcode for Crewe.

Following the edict of 1st January 1976 that all headcode displays should be set to '0000', 47444 is seen at Bangor on the 20th April 1976 working the 15:40 to Euston - train 1A72.

For a special working on 19th February 1977 from Crewe to Blaenau Ffestiniog and Holyhead, 24133 (the only remaining headcode fitted Class 24) had its headcode display brought back into use to show the reporting number of the train - '1L27'.

On busy days along the North Wales coast with its mechanical signal boxes, it sometimes became necessary for trains to carry their headcode. This was usually done with carriage labels, as seen here. 47187 carries 1P72 on 24th July 1976