article: Media playback is not supported on this device Jeremy Guscott, Jonathan Davies, Keith Wood and Andy Nicol have 191 Test caps - including 13 for the British and Irish Lions - between them. They will be on your televisions and radios analysing all the action from the 2017 tournament - but we've nabbed them first to find out who they expect to win, and plenty more besides. Media playback is not supported on this device Former England centre Jeremy Guscott: England are the reigning Grand Slam champions and have won 13 out of 13 under Eddie Jones, but being realistic they haven't taken teams apart with amazing attack. It's been very much brutal defence that's been giving them the edge and improved fitness. They may need to produce more than that this year. Ex-Wales fly-half Jonathan Davies: Wales will have to perform better defensively - and more importantly offensively - if they are to be contenders this year. They also need to have more variety in their game. Keith Wood, former Ireland hooker: Ireland are looking very good at the moment. The coaching seems to be a little more flexible than it has been and the team seem more comfortable, with the current gameplan suiting the expanded squad. Former Scotland scrum-half Andy Nicol: Scotland are in pretty good shape - they are definitely improving, with a well-balanced team and good coaching. There is confidence throughout the squad after a positive autumn, as well as Glasgow qualifying for the knockout stage in Europe. My target for them is three wins. JG: It's between England and Ireland. England have three home games (and I expect them to win all three), which gives them a slight advantage, but that is countered with having to play Ireland away. Ireland are playing at a tempo and intensity that the rest of the Six Nations haven't reached yet, and I expect them to win the championship. JD: It's got to be Ireland. However, I don't expect them to win the Grand Slam (winning all five of their matches), so bonus points - introduced this year - will be important. KW: I expect Ireland to win. It is the right cycle of games for them, their confidence is high and the provinces are doing well in Europe. They also have a small injury list - notwithstanding Johnny Sexton's absence from the opening weekend - and more strength in depth than before. AN: England and Ireland start as favourites, with not much between them. They meet in the last game in Dublin with home advantage being crucial and probably the difference between the two. The style that England play and their ability to score more tries and points make them my favourites to win the Six Nations on points difference - or bonus points - but with no Grand Slam. Media playback is not supported on this device There are two main changes this year - stricter rules on high tackles and the introduction of bonus points. The former means anyone making contact with the head of an opposition player,
summary: We have asked four wise old heads what they expect to happen over the next seven weeks in the Six Nations.