An animal rights group has been prevented from displaying posters on local buses and bus stations.

PETA, also known as People for the Ethical Treatment of Animals, made the news last year when they staged a protest outside Windsor Castle slamming the monarchy for their "horrifying" use of bear fur.

At the demonstration on November 15, PETA’s Senior Campaigns Manager Kate Werner said: "This was part of our campaign urging the Ministry of Defence (MoD) to switch to faux fur for making the kings guards caps.

"It is inexcusable that they are continuing to wage a war against black bears when you consider it takes one bear to make one cap.

"Killing bears for ornamental caps is completely at odds with British people's morals."

READ MORE: Animal rights group hits out at the King's guards 'horrifying' use of bear fur

Now the group have rolled out a new advert urging the MoD to drop bearskins and to stop "hiding the bloody reality". 

However, the group's plans to display the posters have been rejected by an advertising firm in Windsor which has cited a conflict due to the association with the monarchy as a reason to block PETA from displaying their posters.

However, PETA members have brandished the reason as illogical, reporting that the late Queen was fur-free and King Charles is open about prioritising sustainability and environmental endeavours.

PETA reports that it takes the skin of at least one bear to make a single cap, stating their wishes for the MoD to replace the bearskin with a humane and indistinguishable faux fur.

The MoD previously committed to ending the use of real bear fur for the caps once a suitable alternative was found, and recent laboratory tests confirm that luxury faux furrier ECOPEL’s faux bear fur performs as well as or better than real bear fur against five criteria set by the MoD.

The company has even offered the MoD an unlimited amount of the faux fur free of charge until 2030, yet the MoD reportedly continues to resist making the switch. 

PETA’s Senior Campaigns Manager Kate Werner said: “Making ceremonial caps from real fur goes against public opinion, ignores the values of a nation of animal lovers, and undermines the legacy of Queen Elizabeth II, who rejected fur in her later years.”

“The unjustifiable rejection of this ad won’t stop PETA from continuing to demand that the MoD honour its commitment and embrace modern, humane faux fur.”

According to PETA, over 90 per cent of the UK public rejects wearing animal fur, and 75 per cent consider the bearskin caps to be a poor use of taxpayer money.