Warranty is one of the biggest consumer cons in Britain ever, we're not the fucking USA so stop thinking like we are.
Let's have it out right......
A manufacturer of any product from anywhere in the world has no obligation whatsoever to provide any guarantee at all to the said products effectiveness/safety.
We have standards issued in Britain to try and reassure OUR consumers that the product is safe to use in our country (kite marks and CE stamps for example), if you're product doesn't conform to those standards then you're not allowed to sell it in our country (I think) but that does not stop a consumer from importing said product and using it anyway.
For matters other than safety the "Sale Of Goods Act" is UK legislation that was put in place years ago to protect consumers against getting ripped off.
The sale of good acts automatically covers ANY product and it's sale for "up to 3 years" at the sellers obligation, even second hand items.
Law is law and as such law over rules any company policy, you're covered already as standard, why the fuck would you ever need a warranty?
Unless it's free and for longer than 3 years.
