Sunday tips: Harry Allwood's two Sky Bet Sunday Series picks

Best odds: 9-2.

Assail remains lightly-raced for a five-year-old, and should have more to offer over marathon trips this year.

David Simcock's gelding has gradually progressed over the past couple of seasons and after bolting up at Ascot on his turf debut, he then scored off a 7lb higher mark in a 0-95 contest at Kempton, the form of which has worked out well.

The runner-up has won three times since (and was last seen winning the All-Weather Championships Marathon) plus the third won at Ascot this month and had some decent handicap form next to his name prior to the Kempton contest.

That suggests the selection remains fairly treated off a rating of 90, and it is probably best to forgive his effort in a hot handicap at Meydan 100 days ago. 

He's reunited with Luke Morris, who is two from two aboard Assail, on Sunday, and good to firm ground is a positive. Simcock also recorded a double on Saturday, and has his team in good form, so a short absence is not a huge concern here. 

With further progress on the horizon as Assail races over 1m6f for the first time, there appears to be plenty of positives, and 9-2 looks a fair price.

Best odds: 6-1.

This three-year-old looked a horse to follow this year when bolting up at Southwell in January, and he also showed plenty of promise in defeat last season, including when second to a rival now rated 111. 

That does, of course, make Marchogion look nicely treated off a rating of 85, and while he's failed to land a handicap from three attempts, he has not enjoyed much luck on his past two outings in useful contests. 

He endured traffic problems before flying home at Lingfield in February, and would have probably won with a clear run, before a wide draw (there was a track bias) went against him at Newcastle last time out. 

Both of those efforts signalled he is ready to strike off his rating, and I still believe he is ahead of the handicapper. 

Returning to turf should not be a hinderance as he ran well on his first two starts (on good and good to firm ground) and is a shade overpriced at 6-1.