I'd appreciate your help. After updating fishingbreaksireland.com to version 2.5.1, I've noticed some strange code appearing at the top of every page.
I won't copy code here as it's too long, but maybe someone could take a peek and let me know what might be the problem.
Since upgrading, I've also found that, apart from the home page, I'm getting constant 404 errors.
I've just added a secret key to the config file just in case this had been hijacked, but this hasn't resolved the problem.
Would really appreciate your help. Thanks.