Who owns the trademark?

You can turn your refrigerator into a replica Police Public Call Box ... but will it get bigger on the inside?  And Who, if anyone, owns the rights to this iconic British symbol? 

(The website says: "In the true spirit of parody, a customized refrigerator kit to turn your fridge into a Police Box.... There is also a Sound Box available; an audio module that fits inside the fridge that can be programmed to play your favorite Police Box sounds whenever the doors open. I have mine set to play several sounds from one of my favorite TV shows.")