Watching RT for five minutes or so was enough to convince us how awful the Russian propaganda was.
I don't think banning it now will make much difference to public opinion in the UK.
It might have made a difference if it had been banned in 2016.
Lets not forget that at the time of the fraudulent referendum of 2016, the only three foreign political leaders who backed Brexit were Vladimir Putin, his puppet Donald Trump, and the French fascist leader Marine le Penn.
It has always been a mystery to me that British citizens voting in the fraudulent referendum, were not warned against voting "Leave" if they actually knew the company they were keeping.