Fans have spotted sets for 'Bloodmoon' and various filming locations have been closed to the public

Last month, we brought you the news that the rumoured 'Game of Thrones' prequel had reportedly already begun shooting.

Now, it's been confirmed that filming on the series is underway in Northern Ireland, although details on the plot remain thin on the ground. We do know that Naomi Watts is set to star, while other actors include Naomi Ackie, Denise Gough, Miranda Richardson, Josh Whitehouse, Jamie Campbell Bower, Sheila Atim, Ivanno Jeremiah, Alex Sharp and Toby Regbo.

The prequel - which is either called 'The Long Night' or 'Bloodmoon' - is set five thousand years before 'Game of Thrones'. George R.R. Martin previously explained: “There’s no King’s Landing. There’s no Iron Throne. There are no Targaryens — Valyria has hardly begun to rise yet with its dragons and the great empire that it built. We’re dealing with a different and older world and hopefully that will be part of the fun of the series.”

Jane Goldman is the showrunner and we may be waiting until spring 2021 for it to debut on HBO, if/when the pilot is greenlit for a full series (which of course it will be.)

There have been rumours that the show is being shot at various locations around Northern Ireland in recent weeks. Marble Arch Caves and Cladagh Glen in Co. Fermanagh have been closed off; all very 'Children of the Forest' locations.

This fan Twitter account  had some recent images from the sets at Belfast's Titanic Studios, where GoT was filmed...