Sorry not my understanding of the situation. Canon UK will not honour the warranty of a grey import from HDEW.
They will allow you or HDEW or their insurance underwriters to pay for the work and will carry out the repair. BUT ONLY if the serial number is valid. So if it were a fake job like Digital Rev. Then you cant get the item repaired at the only 2 UK service centres geared up to repair the 5D3!
Likewise Canon UK will not replace the unit if it was terrible, like say they may choose to do if it were UK approved dealer supplied.
The other issue is will HDEW guarantee to allow you to have it repaired in a Canon UK repair centre. I asked for this in writing and they refused and suggested I buy elsewhere!
Basically if you want to put all these cuddly warm fuzzy promises in writing they wont!
Thats why I am not impressed - likewise not overly impressed by someone, who says, well I bought 3x 1Dx and have had no trouble!
What would impress me is someone who had a problem and the unit was replaced quickly by a supplier with them paying for the collection. Or getting it repaired at the official Canon authorised "BY CAMERA" centre in a timely manner.
What I have seen in a number of posts is that some of these companies (not HDEW BTW ) try and force you to pay for the postage back to HK or China, always really expensive. Plus very risky.
This is not true and I had it confirmed by canon UK! They will only honour warranty for goods supplied by official,Canon dealers.
Anyone who says otherwise needs to get the Canon employees name and a Canon UK email address for them. That you will never see!
As I say, I have not had to have my 5D3 serviced so I am not speaking from personal experience. I am simply referencing that I have seen many posters on here state that their camera from HDEW was accepted by Canon UK for warranty work and others who have, apparently, been told that Canon UK will perform warranty work on cameras supplied from any UK dealer, regardless of origin, so long as you have the UK receipt.
I am quite happy to accept that this is likely dependent on who deals with the case at the time. There have always been inconsistencies between "official policy" and what Canon actually do, they often go outside the official guidelines for a number of reasons. I have seen a number of instances in forums where one person had work done under warranty, where the same issue was charged for with somebody else. It depends who makes the decision at the time.
From what I have read, it seems that in general those sending HDEW supplied bodies to Canon have had them accepted under warranty. Frankly, I am not concerned particularly whether they are or not. As I stated above, I see my warranty as being the HDEW one and have no problem sending it to them, for them to forward to Canon and pay for the work to be done, instead of me sending it to Canon under warranty. Either way I get the work done, at a Canon service centre, at no cost to me.
It is possible, I suppose, that HDEW have an arrangement with Canon, whereby if anybody sends in a Canon body (with an HDEW receipt andf under the warranty period) that Canon simply fix it and forward the bill to HDEW.
On none of the occasions I have seen, where somebody has posted that they got warranty work done directly with Canon, on an HDEW supplied body, has anybody come back with a post to say that they tried and were turned away.