It's the automatic white balance calculation in the camera. The two sides of the same coin can reflect different amounts of light into the camera lens, affecting the calculation of white balance and thus producing slightly different hues. It can also be caused by your light source changing temperature over time, so always let your lamps fully warm up before taking your pictures.
I opened the page using Chrome, then pressed F12 to allow you to browse the page source. Selecting 'Sources' then browsing the structure below 'www.baldwin.co.uk' and then 'media' until you find the image file 'BH134.jpg', of which there are two sizes - select the larger of the two. You can then see the image and right click and save.
No, not really. The cameo on the silver reduces with the size of coin. Any cameo on the bronze is not particularly noticeable. Here's the penny obverse.
In Photobucket, go to your library, click on a picture you want, then click on the "direct" link to the right of the picture. Then you can insert that link here, either by simply pasting it, or by using "Insert image from URL".
Whether or not a coin contains the denomination does not have any bearing on whether it is legal or not. The various Coinage Acts over the years allow the government to make a proclamation that specifies what constitutes a particular denomination and as long as a coin meets those requirements it is legal.
Here is an example of a proclamation: https://www.thegazette.co.uk/notice/2446362
I think it's a page coding issue. If I narrow the window gradually, the like button disappears when the window reaches a certain width. Sometimes it hops down to the next line, but not always.
Sadly, any value it had disappeared with the harsh cleaning. I think that the Spink VF price of £45 is much nearer the mark than the asking price £450.
I recommend that you scan your computer with Malwarebytes, it's free and one of the best at finding and removing malware. It's a premium trial and features are time-limited, but just let it do its thing and then remove it if you wish.