Has becoming a villain involved any other costume changes?
Far fewer, happily. I used to get really jealous of Gwen – Angel – because she’d be in the same costume all day whereas I was constantly being pulled into wardrobe to get changed and have my makeup redone. It really wasn’t glamorous.
Now it's the reverse. I get to relax and have a nap while Angel has to spend an extra four or five hours a day changing and sitting in the makeup chair. Plus, Morgana's corset now only goes as far as her waist so I can walk, whereas before it was very long. Eight months in a corset is not comfortable. I swear I can feel my organs moving round after I'm released from it. I shouldn't really complain because Bradley’s in chainmail but I still do!
Can you reveal any of the guest stars in series five?
Liam Cunningham, who plays a magical rebel freedom fighter that Morgana allies with for a couple of episodes. It’s really nice to have another Irish actor in the show. The cast list for Merlin just gets better and better every episode, every season – people I’ve admired and been in awe of my entire life, and then all of a sudden they’re standing in front of me, chatting and having a cup of tea. It’s when all of a sudden that becomes normal that you realise: wow, life has got pretty fantastic.
Are you ever starstruck?
I’m glad I never met Warwick Davies because I would have dissolved into a puddle on the floor. I’m a bit of a sci-fi geek.
What’s it like behind-the-scenes?
What’s really nice about this is that for all four of us this is our first big job. We’ve come from nothing to being broadcast in 180 counties and we’ve gone every step of the way together. So we share a bond that anyone who has been through that wouldn’t understand.
Was there been any romance on set – with one of those swashbuckling knights perhaps?
People always say “but they’re all so handsome how can you not…?” Because I’ve seen them bleary-eyed at six o’clock in the morning and sweating in their chainmail and cranky after a long day. It’s like having six extra brothers. We all look out for each other: when things are tough you get through it together and when things are great you celebrate together. I know it sounds cheesy and clichéd but it’s true. When we’re not filming, we’re always texting.
Any weird and wonderful fan mail?
It all goes to the BBC and my agent who take out anything they don’t think I’ll want to read, so I only get lovely letters going: I think you’re amazing, can you sign this? I’ve had dolls, hats, jewellery, a couple of marriage proposals and a lot of food – apparently Morgana looks hungry!