A frequent critic of Prime Minister Rishi Sunak since he took office last autumn, Ms Dorries told TalkTV earlier that the last thing she would want to do would be to cause a by-election in her seat.
Speaking to the broadcaster after the announcement, she admitted that “something significant” happened to change her mind.
She told TalkTV: “The bottom line is really, I’m doing my own show on TalkTV and I write a column in the Daily Mail every Tuesday, which takes a lot more time than I ever thought it would do.
“It’s actually hard work. I’ve been working like seven days a week and I’m also managing these outside jobs as well as my role as an MP.
“And the House of Lords thing was on the cards and it’s gone back to Holac (House of Lords Appointments Commission) for MPs to be vetted or whatever and I just thought, you know, I think this is the time actually for me to stand down.”
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