A new vocalist, Sean Filkins was recruited to replace original vocalist Martin Read and a fourth album, ‘Gathering Speed’, was released in March 2004. Gathering Speed was a concept album which told the story of a fighter pilot in the summer of 1940. It marked a significant change in direction for Big Big Train with the band exploring classic prog-rock territory with the addition of post-rock influences.
The Difference Machine album was released in September 2007 and featured guest performances from Pete Trewavas and Nick D’Virgilio.
In 2008, Big Big Train re-released English Boy Wonders (an updated and completed ‘director’s cut’ version of the album which was partly re-recorded by BBT and fully re-mixed by Rob Aubrey).