This comes with a 5 year manufacturer's warranty, and is £40 less than anywhere else I could find that has it in stock. Most other places seem to be asking well over £500.
Delivery is included, and they will also take away your old machine if you want.
Full specification here:
The 5 year extended warranty is though online registration here:
You can get another 3% cashback from Quidco or topcashback, which should bring it down to £407.