[MapPress Easy Google Maps] Change map zoom so multi locations are shown

Hi

I’m using the the Plugin MapPress Easy Google Maps and have created a map that shows 4 different locations in the UK ( link here), however when viewing the site, it zooms in on the last location I added so you cant see the 4 different markers for the other sites.

I went into the plugins files and edited the mappress-google-maps-for-wordpress/mappress.min.js file in the first line and changed the zoom which was set at 10. However either it will show the whole world or just one location, and basically I was just enough zoom to show the UK.

Hope someone can help me with this – if you need anymore info please just let me know.

Thanks
Sam