How to scrape all locations of Starbucks?

Websites such as https://www.starbucks.co.uk/store-locator , only returns a limited number of locations for each submitted query.

For example, if you search for Starbucks locations in London, it only returns a very limited number of locations instead of all.

How to design a method to scrape all the Starbucks locations?

(I'm asking the general idea, not the scraping basics..)