Greatrex frets over Sea

Warren Greatrex is clinging to the hope Tranquil Sea makes the cut for the Crabbie's Grand National at Aintree on Saturday week.

The 12-year-old is creeping closer to getting a run in the world's most famous steeplechase, but is still some way short.

"Tranquil Sea is still in the Grand National and now has only 15 to come out to get a run," the Upper Lambourn trainer told

"This is still unlikely but we will keep him in and see what happens. He is in good form."

Tranquil Sea showed an aptitude for the unique Aintree obstacles in two runs when trained in Ireland by Edward O'Grady, finishing third in Grand Sefton Handicap Chase in December 2012 and sixth to Triolo D'Alene in last season's Topham Chase.

Despite returning to winning ways at Doncaster in February, he was pulled up before the last fence of the Kim Muir at the Cheltenham Festival a fortnight ago.