I assumed it was the Bermuda ensign, with the central shield not visible. In which case the answer to your question would be, "Because a Russian kleptocrat paid the requiredI'm surprised the Brits let that monstrosity fly their flag.
While it is of dubious value it is inherently a million times better than A because it consumed likely very little or perhaps even no new resources to achieve a comparable level of ugly.Puzzled why nobody made the Sailing Yacht "A" connection yet.
IDGI, this seems to be an unremarkable plywood homebrew from plans by Glen-L? How high is the seller here that they thought it necessary to call up Cape George Marine to try and save it?
Now here is a find-
Free Sailboat @ South Coast 26 (Belhaven)
He really sells it in the description.