Course it can. Anything from outside of the UK could be subject to customs checks. The thing to watch with grey imports is that if you buy one and it's not had VAT and duty paid on it due to it not being checked then you can be fined and likely will get a criminal record if you somehow get caught because it's your responsibility, not the seller, to ensure the taxes are paid when importing products into the country. Here's the terms from their website:
"By purchasing a product through the Site, customers outside of Hong Kong authorise DigitalRev Limited to make arrangements for clearance of customs on their behalf for the products they have ordered.
When ordering goods from DigitalRev Limited, overseas deliveries may be subject to import duties and taxes, which are levied once the package reaches the specified destination. Any additional charges for customs clearance must be borne by you, unless an Import Handling Charge is included in the price of the goods. Customs policies vary widely from country to country, so you should contact your local Customs officer for further information. Additionally, please note that when ordering from DigitalRev Limited, you are considered the sole importer of record and must comply with all laws and regulations of the country in which you are receiving the goods. Your privacy is important to us and we know that you care about how information about your order is used and shared. We would like our international customers and customers dispatching products internationally to be aware that cross-border deliveries are subject to opening and inspection by customs authorities."[/QUOTapparetnly digital rev have a garantee on no extra