Earlier this month, Petlog, the microchip database for pets in the UK, updated their website. A lot of pet owners are now reporting that their pet's microchip details haven't transferred over to their account on the new site.
You can check here: https://www.petlog.org.uk to see if your dog's data is still listed correctly. If you haven't logged in for a while, you'll need to create a new account and have your microchip details to hand. You can then input your dog's chip number and Petlog will reconnect their details to your new account.
With dog theft more prevalent than ever before, it's unfortunate timing to have so many owners unable to access their microchip accounts. This appears to be just teething issues with the new website, and we're confident that the problem will be resolved quickly.