Yup, I saw it but I wasn't certain about an answer. I don't use Chrome myself, as I prefer to use Slimjet (which, however, is based upon the same 'source level' browser, Chromium, that Chrome is). As the same basic code is behind both browsers, it's probably unsurprising that I've also noticed Google search terms jumping into the browser's address bar (or 'omnibox', as the developer's of both browsers prefer to call it).
Of course, you should never need to visit google.co.uk anyway (or use a dedicated search box within your browser), as the omnibox performs exactly the same function anyway. (I search Google at least 100 times each day but I never go to google.co.uk). However, if you want to keep on using Google's search page (or a dedicated search box), you might be able to stop the 'jumping' behaviour by setting the omnibox's behaviour to use something other than Google as its search engine (thus breaking the link between the search terms you type and the omnibox).
So give this a try:
Click the three dots (top right).
Select 'Settings' and then 'Search engine'.
Change 'Search engine used in the address bar' to anything other than Google.