Fancy Feral Pigeon

Hi, I'm relatively new to the site and didn't know where to post so forgive me if I have posted this within the wrong discussion. 

I snapped this feral pigeon in my garden last October but noticed that it has very strange colouring. Has anyone ever seen a feral pigeon with these colourings and can anyone tell me anything about it?

Thanks 

https://www.flickr.com/people/156359183@N07/ 

https://www.flickr.com/photos/joanneshaw1967/