IT'S a phrase that goes back centuries and means nothing complimentary.

Today the term "perfidious Albion" is trending as Twitter reacts to the latest news about Brexit.

Last night it emerged that Downing Street is preparing new laws set to override a key part of the EU withdrawal agreement that was set just last year.

No 10 says the plan is just a stand-by, but it's provoked a strong response from commentators, sending the term "perfidious Albion" around the internet.

The term, which means "untrustworthy England", or in some usages, Britain, is a rendering of wording that first emerged in French in the 1790s and is usually attributed to the playwright Augustin Louis de Ximénes.

And it's long been used in discourse about diplomacy, or the lack of it.

It was amongst the biggest topics of the day on Irish Twitter.