claim: Probot was a side project of Dave Grohl's.
evidence: Ampthill tunnel is a railway tunnel at Ampthill on the London Midland region between Bedford and Flitwick .. tunnel. tunnel. Ampthill. Ampthill. Bedford. Bedford railway station. Flitwick. Flitwick railway station. There are two bores ; one carrying a pair of fast lines , the other a pair of slow lines .. Both are 715 yards long .