Hi there,
As a Google Developer Expert, do you have permission to use the BBC trademark? Upon review, I see no mention of permission to use the BBC trademark or copyrighted images. Additionally, there is no clear description of what the extension does. Is it a VPN Chrome extension? Also, avoid the use of brand names (BBC iPlayer, ITVX & Channel 4). If it supports multiple websites, try to provide a website link and mention it on that website. Please endeavor to explain it better and more clearly for new users.
A good tip is to read the best practices on the Chrome Developer documentation page. This page provides guidelines for designing a high-quality extension and Chrome Web Store listing: