And Martin Compston teased a further series of the show as he celebrated after the wins.
The Steve Arnott actor said: 'Jed Mercurio [the director and creator] will only come back if he believes there's a story to tell. The show gets bigger as the audience gets bigger.
NTAs 2021: Martin Compston teased a further series of Line of Duty as he celebrated after the wins
'Jed Mercurio does everything for a reason. You all want us all back don’t you?' he teased.
After the explosive sixth series saw criminal mastermind 'H' unveiled as DSU Ian Buckells (played by Nigel Boyle), Nigel said: 'People still keep calling me H. I get it playing golf, walking down the street. It’s been a bit different.
Executive producer Simon Heath also added: 'We wouldn't change a word of the ending. There’s something interesting about a buffoon hiding in plain sight.'
Both Jed Mercurio and Vicky McClure - who plays Kate Fleming - couldn't attend the ceremony due to prior filming commitments.
Joy: Martin Compston, who takes on the role of Steve Arnott in the gripping drama, neither confirmed nor ruled out an additional series
Success: Of the controversial ending, executive producer Simon Heath (right) said: 'We wouldn't change a word. There’s something interesting about a buffoon hiding in plain sight'
Yay! Line Of Duty had a very successful night and bagged two awards - Special Recognition and Best Returning Drama
But both took to their social media platforms to express their gratitude to fans of the show.
Jed penned on Twitter: 'Thanks so much to all our fabulous fans who voted for #LineofDuty at the National TV Awards. We’re honoured to have been included alongside such outstanding nominees.
'Sadly @Vicky_McClure and I are filming and couldn’t be there to celebrate with our brilliant AC-12 mates.'
To her 650,000 Instagram followers, Vicky wrote: ' [sic] THANK YOU SO MUCH!!! LOD fans, you truly are the best of the best!! ♥️ @mrmartincompston have a few for me mate! @officialntas @bbclineofduty'.
Unable to be there: Director Jed Mercurio and Vicky McClure - Kate Fleming - couldn't attend the ceremony due to prior filming commitments
She said in a heartfelt video: 'Hello there, I thought I had better do a little video just to say - oh my god thank you so much. Sadly not a glamour NTA moment here but gutted I couldn't be there. Absolutely gutted.
'So blessed and so grateful to everybody who voted for the show - and everyone who voted for us in the acting category, you know we saw that you were all voting and it was so, so beautiful of you all to do that.
'And David Tennant is an absolute legend so I'm so