L400 (51332, 59484 & 51374) emerges from the west portal of Brunel's Box Tunnel on 11 April 1982. Quite what it is doing traveling between London and Bristol is a mystery, as its usual area of operation would be London and the Thames Valley. Possibly a short term transfer to Bristol? This impressive view of the ornate tunnel entrance is not so easy now as the amount of vegetation on the right hand cutting side has increased considerably.