Openly gay LBC radio presenter Iain Dale has accepted a police caution, and published a blog post apologising for his involvement in a scuffle with anti-nuclear protester Stuart Holmes, and his dog, also named Stuart, on Brighton sea front two days ago.

Mr Dale, also a political blogger, who runs the firm that published the book Power Trip, by Damian McBride, Gordon Brown’s former spin doctor, was shown in a video grabbing the protester who apparently tried to interrupt a television interview with Mr McBride.

In a blog post, Mr Dale wrote that once Mr Holmes started protesting in the shot behind the interview, he asked television show Daybreak staff to intervene, but they did not, so he “did what any self respecting publisher would do, got out of the car, ran across, got him in an armlock and pulled him out of the shot.

“He started resisting and we ended up in an unseemly tumble on the ground.” He said that there was “no real violence” during the incident and that “the only injury was when the man’s dog bit him on the bum”.

In today’s blog post, Mr Dale apologised to Mr Holmes, and also apologised for his original statement, and to Ed Miliband and the Labour Party conference attendees.

Calling the fight “idiotic”, he said he was full of “absurd bravado”, and that he had embarrassed himself, his family and his colleagues. He pledged to buy a new placard for the protester, and make a donation to charity.

Many had taken to Twitter to note that the sign carried by dog Stuart, contained a gramatical error, as it read: “No Nuke’s”.

Mr Dale’s full apology is available to read below.

Following the incident on Brighton seafront on Tuesday morning, I have today voluntarily attended Brighton police station where I accepted a police caution. The police have informed me they now regard the matter as closed. I want to thank them for the fair and courteous way they have dealt with me throughout.

But above all I want to issue this public apology for my behaviour.

I want to apologise and say sorry to Stuart Holmes, who is a passionate campaigner and well known to everyone who attends party conferences and was perfectly entitled to do as he did on Tuesday in trying to get attention for his causes. It was totally out of character for me to react to him in the way I did.

I also want to apologise for the blogpost I wrote after the incident. It was full of absurd bravado and in the heat of the moment I behaved in a frankly idiotic way.

I have embarrassed not only myself but my family and my work colleagues and I apologise to them.

I also want to apologise to Labour leader Ed Miliband and his conference attendees.

I did apologise personally to Mr Holmes on Tuesday afternoon and we shook hands. He agreed to let the matter rest, but I have no complaint that he changed his mind on reflection.

Since the events of Tuesday I have gone through what happened over and over again in my mind. Whatever I felt at the time, nothing can justify what I did.

In addition, having accepted my guilt, I feel I should make some sort of reparation to Mr Holmes. I will pay for a new placard for him and also make a donation to a charity of his choice.

Finally, people have questioned why I didn’t remove the blogpost and why I have said nothing more until now. On the latter point, I was advised not to because the police were involved. On the first point, I felt it important people should be able to have their say. I will have to live with the justified criticisms for a long time.

I know there will be many who will never forgive me for what I did and I understand that, but those who know me will know that I mean every word of my apology to Mr Holmes, Mr Miliband, the Police, my family, friends and colleagues.

 The video of the fight is available to view below.