On 21 May 1989 it was 'Inter City Diesel Day' when several special trains were run on the Midland Main Line using unusual motive power. This is 56017 at Leicester with the 0955 to St Pancras
20145 and 20228 at Luton with the 1255 Leicester - St Pancras special.
37058 + 37066 wait at Leicester for their turn to work one of the special services.
58050 arrives at Wellingborough on the 1845 St Pancras - Leicester.