All Dogs in England Must be Microchipped Before 2016

My only concern is how this affects the dog. Will it be uncomfortable for her. What if later on in life it will cause tumors or other complications? Granted its useful for us to be able to locate our dogs should they get lost we also have to be fair to them. If their quality of life is compromised we need to think of alternative ways to solve our challenges without causing them discomfort.