1) An Youtube link to TV series "Salvage Squad" - an edition (c2004) where they rebuild an Aveling & Porter E Type roller similar to Simon's in 10 days !
https://www.youtube.com/watch?v=alCLTC75b70
2) From Youtube : Trevithick Day in Cambourne Cornwall 2017 - the roller is features at these times 13.56-14.29
https://www.youtube.com/watch?v=SVTdvKnxfHY
Another one - the roller features during these times : 1.20-2.13; 6.37-6.57; 17.16-18.00
https://www.youtube.com/watch?v=ZkPjQsK4j8k