(This is going a bit OT onto jointed track in general - so moderators, feel free to move...)
Glad to hear it still exists. I miss the sound of jointed track: a mainstay of even main line travel in the 80s and even the 90s. The sounds of jointed track and other things on the Portsmouth Direct on the Haslemere-Guildford section in particular in the 80s were almost musical: so much so that one could imagine someone composing a 'Commuter Symphony' out of various noises the track made as the train progressed from Haslemere to Guildford. Salisbury to Westbury in the 90s, particularly around Warminster, was similar. Who remembers the very high-frequency (=short joints) jointed track just as the train came into Warminster from the Salisbury direction, for instance?
On that topic: back in those days there was also a 'wind-like' "WOOOOOO...." sound effect on certain sections of track, often accompanying jointed track. Sections where this was particularly prominent include Witley to Milford northbound; around Worplesdon northbound as the line crossed the heaths north of Guildford; and a short section between Warminster and Dilton Marsh at the point the line descends off the chalk onto the plain. Any ideas what caused this?