Nicky Henderson is facing a nervous four weeks until the Cheltenham Festival as he prepares to unleash the “extraordinary” Constitution Hill in the Unibet Champion Hurdle.

Kempton Park on Boxing Day remains the next target for Constitution Hill on his way to Cheltenham in March.

Nicky Henderson’s Constitution Hill was an easy winner of the Betfair Fighting Fifth Hurdle at Newcastle.

Nicky Henderson paid a heartfelt tribute to Buveur D’Air after connections confirmed the dual Champion Hurdle winner’s retirement.

Cheltenham Festival-winning rider Noel Fehily could have two runners on the Thursday of the meeting with his racing syndicate.