Site infected with Blacklist?

Hi Brian,

We would like to get more details and assist further.
Could you please share a screenshot of AVG threat detection popup by clicking on 'see details' from it?
You can post the screenshot by clicking on 'Image' symbol from 'Answer' field.
We also request you to check whether you get the threat detection when you visit the website on any other browsers.

I have been using AVG Internet Security for years. I was always able to access my website within the BT website building site for communities (www.btck.co.uk). Recently, every time I try and access the site I am met with the following:
"We've safely aborted connection on www.btck.co.uk because it was infected with URL:Blacklist".
I need to access this site, why am I being denied access to a site run by British Telecom (BT)?
Could you help me access the site again please?

Hi Brian,

We would like to get more details and assist further.
Could you please share a screenshot of AVG threat detection popup by clicking on 'see details' from it?
You can post the screenshot by clicking on 'Image' symbol from 'Answer' field.
We also request you to check whether you get the threat detection when you visit the website on any other browsers.

Thanks for the reply.
I attach a screenshot.
I have also tried using Microsoft Edge browser and the same thing happens.
User-added image

You are welcome, Brian.
In order to analyze the root cause, we request you to get connected with our additional support.
An email instruction has been sent which will help you to get connected.
If the email is not found in inbox do check in spam and junk folders.