Yes it comes with a worldwide Honda 2 year warranty, and can be serviced at any Honda authorized small engine dealer. The connectors are different to uk, but for pounds can be changed if you want to.
The Comet pump has representation in England as well. It has a warranty of 5 years, but does not include wear parts such as seals,check valves ect. As i said, i wanted to set this up properly, get the right equipment first off, so i have spent two months researching. I could of bought second hand or cheaper, but in the long run i think this was the best way.