The following quote is from a news story, which you can read in full at http://jewishnews.timesofisrael.com/holocaust-denial-leaflets-distributed-on-uk-campuses/
Literature denying and belittling the Nazi genocide [of Jews] has been found at University College London, Cambridge University, Edinburgh University and Glasgow University, according to the Union of Jewish Students (UJS).
The leaflets deny the existence of gas chambers.
Look at my photo above, which shows the alleged gas chamber in the main Auschwitz camp. I composed this photo to show that there is an open doorway into the oven room where bodies were burned after they had allegedly been gassed.
Actually, this doorway was not there when these rooms were used by the Nazis. It was added later so that tourists could easily move through the rooms, on their tour of the gas chamber.
If gas had been used in a room right next to hot ovens, it would have caused an explosion. That is why Holocaust deniers say that this room was not a gas chamber. The alleged gas chamber room was actually a morgue where bodies were stored, waiting to be burned in the ovens next door.
You can read about the oven room, next to the alleged gas chamber, on this page of my website: http://www.scrapbookpages.com/AuschwitzScrapbook/Tour/Auschwitz1/Auschwitz08B.html