The sync setting won't sort it Jackdaw. Click on the 3 dots top right ...
Then settings....the cog wheel.( down in the menu box)
Then site permissions (over on the left in the menu box)
Then notifications in the new menu.
Now make sure that you have the sliders both showing blue and then click add in the blocked sites option and add metro to it. When you click add in the block option it opens up a box that you enter the website and will need to begin with
https:// and should then say metro or whatever after that. The best way is to copy and paste from the site and it should look like this
https://metro.co.uk/
Be careful who you let agree to give you notifications in future perhaps or you can be blitzed with them. Most sites also allow you an option to stop receiving notifications.....but not all.