Game of Thrones actor Iain Glen has said the measures put in place to prevent script leaks on the set of the show caused problems for the cast.

The Scottish star, who plays Ser Jorah Mormont in the hugely popular HBO fantasy series, opened up about the convoluted process involved in accessing the scripts for the eighth and final season, which is due to premiere in April next year.

Speaking on BBC Radio 5 Live, he said: "They're absolutely paranoid now about anyone finding out anything about the series and spoiling it.

"We weren't allowed a written word on a page. Everything was accessed through iPads with different security you had to get through to access it, which caused a problem for the actors, I have to say.

"But we find a way, either on phones or with pads, or different ways for it to be available on set."

Iain Glen says Game of Thrones producers are "paranoid" about script leaks

Glen said that the cast read through the scripts for the final season in one go, and that there were moments of shock as they realised how the show was going to end.

He was full of praise for the writers, saying they "really came up trumps" with the concluding season.

"Honestly, these six episodes are absolutely phenomenal", he said. "The writers really, really came up trumps.

"The way they pulled it all together was a real writing task.

"There were a lot of tears that day... and it's been a season of that because it's been a season of farewells and finishes."

The eagerly awaited final series of Game of Thrones airs in April 2019.

Get a hint of what to expect from this suitably ominous teaser trailer.