The original Dell warranty applied to the printer service tag number at the point of purchase from Dell still applies. If the reseller bought it from Dell on April 27, 2014 with a 2 year warranty, the 2 year warranty does not "start over" when they sell it 11 months later. If the UK vendor bought the printer from Dell on April 27, 2014, then that is when the warranty starts. Not when you purchase it from the reseller. What you bought was the "remainder" of the originally purchased warranty. If you had bought the printer directly from Dell, you would receive the full warranty. You will need to pursue this with the Dell UK team.
I bought a new C1760nw Printer from a UK vendor - shipped to me on 10 March 2015 and I registered it myself online on 12 March 2015. Just checked the warranty details on the website and found the warranty had a recorded Start date of 27 April 2014 (11 months before delivery!) and End date 27 April 2015 (one year only from wrong Start date).  'Country' is also wrongly shown as France - although I live in the UK. Can anyone please tell me how to correct these details? Can't see a relevant email address on the website.  Appreciate some advice - thanks!   
Warranty Wrongly Registered - Wrong Dates and Country!! How to correct?