Mishriff is the deserved favourite and holds a great chance to land a Group 1 in UK to add to his stellar resume. This horse has gone through a path that no other has trodden before; winner of a Group 1 in France in the French Derby, winner of the world's richest race and on dirt in Saudi Arabia and winner of the Scheema Classic in Dubai. Winning a Group 1 on dirt and on turf is really unheard of and Mishriff is really peer-less in this category. He did convincingly beat some of the best the USA had to offer on the dirt surface of Riyad and in Dubai he beat one of Japan's best in Chrono Genesis. So, his form is solid. Provided the group is not worse than soft on Saturday, he will be tough to beat.
Addeybb is a top-class horse and will relish the softish conditions. If it gets near heavy, he cannot be opposed. He won the Champion Stakes last year on heavy ground (beating Mishriff in the process) but he really made a name for himself by winning some Group 1's Down Under. Let's be clear here; Australia's midde-distance locals are an average lot compared to the Europeans and winning a Group 1 over here does not have the significance it has in Europe. Addeybb might be rated 3 pounds higher than Mishriff on the official scales but to me, Gosden's horse is on a different, higher level as long as the ground is not bottomless.
St Mark's Basilica is a dual French classic winner having bagged the French Guineas and Derby. He is clearly among the creme de la creme from Ballydoyle and will sport some advantage at the weights against the elderly competitors. He won both Classics on soft ground so the going at Sandown will not be a problem. I still think he's not seasoned enough to take on the above two, particularly Mishriff, but I expect him to give a good account of himself.
I cannot go against Mishriff here. 98 days since his last race might be a concern but he runs well fresh and his class should see him through.
Win: Mishriff