Wikipedia will give a direct links to other countries Google. Formats vary and there are fakers out there pretending to be Google.
If you go to google.uk.com you will be redirected to http://gb.uk.com, which is something called Websearch.
The UK Google is found at google.co.uk.
Just check the list rather the guessing.
Once you are in the desired country's Google site you will need to change the country setting.
Do a search and then find the search tools button.
Change the location. If you don't reset the location, Google shows results based on your IP address and other factors. See Change your location on Google for all the details.