"News of a serious data breach affecting a major UK gun trader are coming to light. The breach involves more than 100,000 records hacked from the retailer’s website."

The More here. 

"As the data that has been hacked includes names and addresses of customers, it would be wise to review your firearms security at home."

Fairly significant breach that could put people in danger. Gun retailer not named, would probably destroy their online business if known. Passwords and user names for customers are comprised so if you have an account with a UK based retailer and reuse passwords then better get changing passwords.

https://www.bbc.com/news/technology-57932823 

It was guntrader that was breached. They sent emails to all their customers warning them to change passwords etc.