[DeoVindiceSicSemperTyrannis]

At the petition site? I don't know. But if you want to support his legal fund, you can donate at his website:

https://tommyrobinson.online/support/

[tbw2]

Another option would be buying his books online, either as a new copy or Kindle edition.

Tommy Robinson, Enemy of the State
https://smile.amazon.com/Tommy-Robinson-Enemy-State/dp/1976446775/