As well as paying for an implanter to microchip your pet, the legislation states owners must register their pets details on an approved website. The approved database websites are listed on gov.uk below.
https://www.gov.uk/get-your-dog-cat-microchipped
These databases vary in cost and benefits.
Some list your pets for free, while others have a cost. The costs could be monthly, yearly, or a one-off payment.
The benefits vary with some having apps, sending out lost pet alerts, free insurance, free tags, free vet advice, and more. Some are more beneficial for breeders, while others are better for individual owners.
Please contact me if you would like more information about these.