The "Short Version" Presentation (1h 24m 12s) by Kit Spackman, former Tilt System Development Engineer APT-E, recorded at Crewe Heritage Centre on the 5th August 2018.
(56m 57s) © Kit Spackman 2018.
(27m 15s) © Kit Spackman 2018.
© R G Latham 2018.