No you have proved nothing, you provided several pictures of a cloud covered Weston Super-Mare, looking “West”, so the sun wouldn’t be visible even if the sun was out, the St Ives/Corbis bay also doesn’t point towards the rising sun, [https://carbisbayholidays.co.uk/Webcam/carbis-bay-webcam/], if you click the top right hand however it gives you a selection of sunset time-lapses that correspond to the timelines that you dispute, and shows clearly what it looks like in the dark, so, well done you have shot yourself in the foot there.
Your whole argument is both faulty and badly researched, you have failed to allow for UK weather, botched your positioning and argued desperately hoping no one would check, but you will still claim a victory as you do not have the capacity to admit when you are wrong.