On 17th September The End Of The Line became only the second film ever to be have a screening at No. 10 Downing Street – a very special event hosted by the Prime Minister’s wife, Sarah Brown.

The specially-invited audience was an eclectic mix of individuals, ranging from people working in the media, to NGOs, restaurateurs, representatives of the fishing industry, and some sixth-form students too.

Indeed Sarah Brown joked that many people were confused as to why they had been invited.

The UK’s Fisheries Minister, Huw Irranca-Davies was there, and both he and Sarah Brown told the assembled crowd just how important and essential they think the film is, and Charles Clover and Executive Producer Chris Gorell-Barnes were also able to say a few words on the issues.

This was a great opportunity, not only for the obligatory photos by the famous door, but also for reaching out to new audiences with the film’s message.

Sarah Brown has been a big supporter of the End Of The Line since attending the screening at the Science Museum earlier this year, and it is with the support of many such individuals that the film has managed to cross over and reach parts other documentaries can’t reach!

As well as the opportunity to see the film, the event was a great forum for the film team, and us fish-hugging NGO-types to talk about the issues in an informal setting with some people who really can help make a difference. The impressive surroundings helped too of course.

It’s rare, for example to get some unfettered access to chat with a government minister, and it’s also great to be able to talk to people fresh from their first viewing of the film about what are the most relevant and pressing things we need to do now.

It would be no exaggeration to say that bluefin was the hot topic on everyone’s lips (and thankfully I’m not referring to the catering).

The urgency of the plight of bluefin is something that we can’t ignore – and it’s something that we must give the UK government some kudos for, as they seem to be taking a very strong international lead on calling for a ban on the international trade in the species.

Thursday night’s screening was a chance for some supporters, notably the glamorous and eager bluefin-defender Greta Scacchi, to get a sense of how they can help at an international level, and for us to forge relationships with some of the people making the decisions, and others keen to help spread the message

And this is, of course, very timely too. Next week will see a crucial meeting when (we hope) EU member states agree to back the European Commission’s proposal for a ban on bluefin trade.

We see in Thursday’s Guardian yet another expose of rampant illegal fishing for bluefin tuna… and we must do whatever we can to make Europe and the rest of the world wake up to the need to take action.