Unowhatimeanharry tops the 13 possibles for the JLT Long Walk Hurdle following the five-day confirmation stage for the Grade One over an extended three miles at Ascot on Saturday.
Harry Fry's classy stayer took his winning streak to six when landing the Long Distance Hurdle at Newbury after he ended his novice campaign with success in the Albert Bartlett Novices' Hurdle at the Cheltenham Festival.
Three-time Long Walk hero Reve De Sivola is in line to make his fifth consecutive appearance in this race. Nick Williams' veteran found only the brilliant Thistlecrack too good when bidding for a remarkable four-timer 12 months ago.
Paul Nicholls is double-handed with 2014 runner-up Zarkandar and Ptit Zig, who has been campaigned in France for his last three starts.
Neil King's ultra-consistent performer Lil Rockerfeller has stood his ground, while the field is completed by Alex De Larredya, Ballyoptic, Shelford, The Romford Pele, Un Temps Pour Tout, West Approach, Surtee Du Berlais and Kotkikova.
The latter would be having her first start for Nicky Henderson since being bought by JP McManus from France.
Henderson told At The Races: "She's good and will do a bit of work tomorrow. There's been a lot of umming and ahhing whether it's hurdles or fences, but we're thinking hurdles at the moment.
"She's in good form. Barry (Geraghty) will probably have a sit on her and we'll decide what to do. "She's actually jumped fences very well, it's just which way to go."