The trio, which are all pro-EU, have cited Brexit and Theresa May's handling of the negotiations for switching allegiances, with Allen citing that May had been bullied by Jacob Rees-Mogg's European Research Group.
Soubry, Allen and Wollaston were joined by the former Labour MP Joan Allen, who quit the party last night to join the Independent Group, which now has 11 MPs.
With the group now having taken their seats in the Commons, a discussion about the future of British politics and what this means for Brexit has begun to happen and, as you can imagine, people have a lot to say.
However, this isn't what you've come here for, is it? No, you want memes and jokes - and here are 14 of the best from another chaotic day in British politics.
We'll start with SNP MP Mhairi Black and her face in this picture, which basically tells you all you need to know
I think @MhairiBlack speaks for most of us on the state of Westminster these days... https://t.co/Y1SYIwMsCD