Why is the wrong time showing on my site?

This is going to be me being an idiot but why is my time stamp 1 hour behind on my WP/ BP site.

It’s a single install and I have gone into settings in the admin panel and selected London as my Time Zone.

It sates that London is currently in daylight saving time and shows me the correct time for London as well as the UTC time being one hour behind.

The site still displays the wrong time, showing UTC instaed of UTC +1.

I have even manually selected UTC +1 rather than London but it still displays the wrong time.

Any ideas?