Katie Hopkins and Tommy Robinson have had their accounts reinstated on X, formerly known as Twitter.
Hopkins, a controversial commentator and former The Apprentice contestant, had been permanently banned from the social network in 2020 for breaching its rules on "abuse and harmful contact".
And Robinson, former leader of the far-right English Defence League, had his account deactivated in 2018.
"Know this. You are not alone. We are many. And we are stronger together. The fight back for your freedom is on."
Robinson's return post was a clip from the video for David Hasselhoff's 1989 song Looking For Freedom - with his own face superimposed over the Baywatch star's.
In later posts he thanked X owner Elon Musk, adding: "I've been censored, attacked, slandered & imprisoned for shining a light on uncomfortable truths that our government wish to hide, the public are now aware I was telling the truth. We have lots to do."
Hopkins has more than 950,000 followers on X, while Robinson has about 332,000.