"It's a shame you're not an elephant, Sidney.
"An elephant? Huh? Why's that, Whiff?
"They say that elephants never forget!
— Whiff and Paxton, Sidney Sings

  • Class: BR Class 08
  • Designer: British Railways
  • Builder: Crewe, Darlington, Derby, Doncaster, or Horwich Works
  • Built: sometime between 1952 and 1962
  • Configuration: 0-6-0
  • Top speed: 15-20 mph

Sidney is a forgetful, blue diesel shunter.


Sidney was one of the Diesels who laughed at Percy's joke when the tank engine first arrived at the Sodor Dieselworks. He only appeared very briefly on a hoist with no wheels. It is currently unknown what happened to him during the fire at the Dieselworks, as he was unable to move from his hoist.

He was still there in the seventeenth season and was often referred to as a Christmas decoration by the Diesels, literally being used as one by Diesel 10 as well. Percy asked how long Sidney had been left up on the hoist and found out from Norman that it had been two years. Percy gave Sidney a new set of wheels as a Christmas present, and Sidney is now a really useful engine again.

In the eighteenth season, he, along with Diesel, Den, and Dart hid from Paxton, who found them again at the end of the day at the Dieselworks.


Sidney is based on a BR Class 08.


Sidney is painted blue with yellow lining and a warning panel under his face. His traction rods are painted red.


Sidney is a bit of a forgetful engine. He starts his day at one location and ends up at another, not remembering how he got there. When it was his turn for repairs at the Dieselworks, he was hoisted up and had his undercarriage removed. Being patient, Sidney was happy to wait, and wait, and wait. He sat there happy to pass the time with any engine that happened to be visiting. Two years later, he still had no wheels, so Percy helped him get a new set of wheels and now he is back on track.


He will appear in the seventh season.



  • Sidney's horn is actually Paxton's at a different pitch.
  • DonaldDouglasandOliver11 stated that Sidney is his favourite diesel engine of the Thomas & Friends franchise.


North Western Railway
ThomasEdwardHenryGordonJamesPercyTobyDuckDonald and DouglasOliverGeoffreyHarveyEmilyFergusArthurMurdochMollyNevilleRosieWhiffBillyStanleyHankFloraVictorCharlieScruffBellePorterGlynnRyanDieselDaisyBoCoBearDaveDerek'Arry and BertDiesel 10SaltyDennisDenDartSidneyPaxtonNormanPhilipFlynnWinstonStaffordJeffAngusTaro
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