Surprising details in STEETART001 record's "Tank with Speaker"-stencil 

Several month ago I discovered this very nice UK-Drum 'n Bass release with it's iconic "Tank with Speaker" Artwork by Banksy. First I was just happy to have found another collector's item, but after I received a copy of this I wondered about some details I noticed in the "Tank with Speaker" stencil shown on the record's label. Details wich I have never seen before, neither on the "Cut Commander" cover nor on the pictures of the stencils Banksy sprayed in Bristol in 1998. In this Version there are parts of the tank's lights visible and also some details of the speaker. I marked the details in the last picture below to make it comprehensible. I asked some of my contacts who are designated Banksy experts, but non of them could find an answer how this could be. The only possible explanation for me is, that the creator of this label received either the original stencil of this motive or at least a picture wich was made with this original stencil, even though it never appeared again since it's use in 1998. The big question now is: who handed out this stencil/picture to the creater of this label artwork?? I don't have the answer to this question and I don't know anybody who actually has. If you have some knowledge about this please contact me via the contact form.