At 1.7 miles long and on a gradient of 1 in 90, Dove Holes Tunnel can't have been a lot of fun to work in steam days. At least today's diesels take the climb in their stride. 66760 emerged from the southern portal into the daylight with 4H74, the 05:52 Washwood Heath to Tunstead stone empties, at lunchtime on 24 May 2023.