In early 1988 the former 37119 was renumbered into the 37/3 series as 37350, and was outshopped in original green livery (albeit with full yellow ends). This was in recognition of the fact that it was the pioneer loco of the class. It therefore also carried its pre TOPS number D6700. Its first public outing was the Hertfordshire Railtours 'Coalville Cobbler' railtour on 5 June 1988. It seen here passing Burbage Common with the tour - the 1Z26 08:55 Euston to Coalville.