Predict gap between Hamilton and Button and win a signed Senna Poster and DVD

I've got a fantastic competition this weekend for JA on F1 readers around the world; we have four signed Senna movie posters and DVDs of the film, ...

I've got a fantastic competition this weekend for JA on F1 readers around the world; we have four signed Senna movie posters and DVDs of the film, released this week, to give away. All you have to do is predict the time gap between the two McLaren drivers at the finish of Sunday's Korean Grand Prix and in whose favour.

So for example if you think that Jenson Button will finish ahead of Lewis Hamilton by 4 seconds use the comments box below and write "Button by 4 secs". Or you could predict that one will finish and the other won't. It's up to you. Only one entry per person, however and we won't accept entries once the cars go to the grid.

Button has finished ahead of Hamilton in the last five Grands Prix. But will this be the weekend when Hamilton gets back the supremacy? The McLaren has been pretty competitive lately, as it was in Senna's day!

The first four registered entries which are correct or nearest to the actual time gap between the pair at the end of Sunday's race, will win a fantastic package of a Senna movie poster, signed and personalised by the film's writer Manish Pandey and director Asif Kapadia and a copy of the DVD. Note: The DVDs are UK format.

The Senna DVD has been a smash hit since its launch on Monday and has sold more than 100,000 copies over the counter already. It is also at the top of the charts on both Itunes and Amazon. The figures are way ahead of expectations, to the point where it is up there with the best DVD sales records seen in the UK in recent years, according to the producers.