Set Safari's default search engine to Google UK How can I change Safari's default search engine to google.co.uk?

Currently when I search in the address bar the results are always from google.com.

Also if I highlight a term in Safari, right click and select "search with Google" it's from the US site.

If I scroll to the foot of the search results page it says "United Kingdom" at the bottom, and gives my location accurately based on my Android phone's location, but it's not actually using Google.co.uk.

If I select preferences, I only have Google, DuckDuckGo, Bing, and Yahoo listed. Is there any way that I can customise this list?
You can try using the AnySearch Safari extension which will allow you to set custom search engines to be used as the default.

Add this as a search engine in AnySearch: https://www.google.co.uk/search?q=@@@