Hello, Steve, I am Keith one of the experts on Just Answer, and pleased to be able to help you with your question.
I concur with your interpretation. If a self employed person does not a have a regular pattern of travel since his travel destination changes all the time a claim for the reasonable cost of meals that he buys while undertaking such journeys is allowable. Of course, if he is employed that is an entirley different kettle of fish as an employed person can only have one place of duty and any travel therefrom is allowable.
I do hope that you have found my reply of assistance.
Thank you for your support.
And also the kind bonus.