Car Insurance - sole trader

Hi there. AS a newbie to the world of being a sole trader, I'm finding this forum invaluable - thank you for looking after it :) Can I check my understanding please - I'll be using my vehicle for business use so I'm in the process of changing my car insurance policy to reflect. I'm using the 'Simplified Expenses' method and recording my mileage as such. Just to confirm - I don't record the extra expense it's cost me to change my car insurance anywhere as the flat payment in 'Simplified Expenses; includes for mileage, vehicle tax and insurance? Thanks in advance - 'there's no such thing as a silly question', right? :)

Hi
Please look at these details
Simplified expenses if you're self-employed
car expenses self employed hmrc youtube