Has anyone ever seen a Great Tit with an orange cap on it’s head?

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Hi, first time posting. I have a pair of Great Tits that come together onto my feeder. One has the regular all black head but the other has a very bright burnt orange coloured cap on it’s head, is this unusual as I’ve never seen it before? I’ve done some research online and can’t find any information that this is a colour variation. I even started to doubt it is a Great Tit! Though I’m fairly sure it is. I’ve spent ages trying to get a photo of it but failed. Then I’ve just managed to video it, though it’s not great quality I’m afraid. 

**added...I’ve realised the video is squashed and shows nothing so have paused it and screen shotted, hopefully that will show up clearly enough.

Many thanks in advance of any help.