Your URL has been removed (Hosts know best) so I cannot be sure - but Google search for " very-uk-international " yielded as the top result what appears to be the online subsidiary of Woolworth's - v e r y DOT c o DOT u k
I would be astonished that Apple would authorize an online competitor in a country where they have their own online Store - BUT - Apple authorizes resellers for Apple products to retail companies that do have online stores
Very(Woolworth's) online has an iPhone 6 starting at £539
AppleUK online Store has the iPhone 6 starting at £539
If you found a variation of some store "impersonating" what appears to be a legitimate reseller "Very" for deeply discounted products, it is likely a down-right SCAM or a front for stolen goods
Find a place to buy Apple Products here > https://www.apple.com/uk/buy/ - caveat emptor of ANY "DEEP discounted" Apple Product - a reseller MAY run some sort of special offer (I guess?)