In the UK, regardless of manufacturer's warranty, the manufacturer is bound to replace the device if it begins to fail within a reasonable time period due to manufacturing defects. For electronics, this is generally accepted as being 5 years. This clause is one of those cited by electronics firms for the 'treasure island' tax applied to things sold in the UK.

Of course, it requires that you spend a whole bunch of time writing letters and threatening legal action. Frankly, for the sake of £150, I'd rather just stop buying things from Amazon; it'll do me good to explore other ecosystems, I guess.