Gavin and Stacey actor answers whether we will find out what happened on the fishing trip in tonight's finale

A Gavin and Stacey actor has revealed whether the ultimate question will be answered in tonight's final episode - what happened on that fishing trip?

It's been a long five years for fans of the hit sitcom, and families across the UK will finally settle down in front of the telly tonight to tune into what will be the final episode.

The finale of Gavin and Stacey will air at 9pm on BBC One, and it's set to break records in terms of viewing figures.

While most will be wondering whether Smithy ever accepted Nessa's proposal, others will be dying to know the answer to a different question...

What did happen on the fishing trip between Bryn and Jason??

Throughout the three series of Gavin and Stacey, a disastrous fishing trip has been referenced on several occasions, with it seemingly having caused a rift between Bryn and Jason, who both avoid ever talking about what happened.

The Gavin and Stacey fishing trip has plagued fans for years. (BBC)

However, fans may be disappointed this Christmas, as Larry Lamb - who plays Mick Shipman - admitted that it's unlikely the trip will ever be explained.

During an interview on The Lewis Nicholls Show, the star was quizzed about whether the finale will reveal what happened on the fishing trip.

"Nobody knows. They're not going to tell everybody. They're not going to tell you that," Larry admitted.

"That's one of those things that keeps people going. That's like, the long-running cliffhanger, what happened on the fishing trip."

He also opened up about how 'emotional' filming the finale was, specifically shooting the last scenes on the very last day.

The actor plays Gavin's dad, Mick Shipman. (Jed Cullen/Dave Benett/Getty Images)

He told WalesOnline: "The whole day was really emotional because we all knew, which is very unusual, that they would film the last day of the series on the last day of the shoot, which never happens. The emotion was building up all the time towards the last day.

"It was like waiting for the last day of school, the last day of term.

"Three, four days before you start thinking 'Oh blimey it's soon going to happen' and then all of a sudden it's happening.

"There we were in the morning getting into costume and ready to start this day."

Gavin and Stacey creators Ruth Jones and James Corden have confirmed that this year's Christmas special will be the final ever episode of the BBC comedy, 17 years after it first began airing.