Changes

| 2023 Spring ||style="text-align:right;" | >6,500 || <ref>[https://www.railadvent.co.uk/2023/05/severn-valley-railways-diesel-festival-breaks-loco-and-visitor-records.html Booth, Janine, 'Severn Valley Railway’s Diesel Festival breaks loco and visitor records', RailAdvent website, 23 May 2023] (Retrieved 24 May 2023)</ref> || More than 6,500 tickets sold across the four days, not counting shareholders using their passes or complimentary tickets. This is the highest attendance at an SVR diesel enthusiast event.

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