The Queen had a three legged one after a dog fight.
Apparently the Corgi is an appalling ride. I would not know as it looks far to easy to fall off, and since that is my main biking skill, I have given it a miss. I have fallen off a Piatti, and one of those suitcase things with handlebars like a billy goat, though. They look similarly challenged in the wheel to ride ratio department. Ariel three, nice big wheels and a solid bottom, much more my style. With enough room to put your leg challenged Royal Corgi in the basket.