I was looking at those in Amazon UK. My kid lives there, so I asked her about the mfg and got no answer.
Why don't you check the reviews on Amazon, see if there are any clues on a UK site?
They are Spanish and seem to do many electronics.
https://www.energysistem.com/en/company/about
About Google, I can't help. I sideloaded onto a Coby tablet and regretted it. Google is getting too nosy.
My inkBOOK uses appmarket. You can also use Amazon for apps.
There is also an Android Tablet forum, they might just cover it. They did cover the Coby. I know it's an ereader, but some companies do have both tablets and ereaders. It covers that release of Android anyway.
http://www.androidtablets.net/