Loram UK and Network Rail in wagon repurposing deal - RailStaff
Railways in Worcestershire
Rail ballast hi-res stock photography and images - Alamy
National Wagon Preservation Group - Greenbrier built two batches of bogie box wagons for Network Rail in 2009. 120 were high-sided wagons coded IOA and used in block formations to deliver ballast
Loaded Network rail JNA ballast wagons Gloucester 26/06/2011 - YouTube
Dapol 2F-045-010 IOA Ballast Wagon Network Rail Yellow 3170 5992 107-0 - Sports and Model Shop