Scored 11 from 5 rides at the EWR last year when Berwick were there.

Hausl is young. He should improve. Lambert's scores are heavily padded by beating very junior reserves in heat 2. You don't get to do that riding at 2. His Scunthorpe performances have not matched his guest appearance at Ashfield. 

Broken ankle

Lambert averaging 1.6 more than Hausl this year, even taking into account he'd no longer be at reserve, that still strengthens the team.

I think it's more than an option, I think it's very likely guests & r/r will be used to cover Dan. How many injured heat leaders have been replaced in recent years, there was Morris replacing Cook after his ban & Klindt for Wright this year? There's not normally spare heat leaders without team spots.

I would say Morris, Howarth & Kemp x 2 as r/r is a better option than Sedgmen. They could always give Sedgmen some guest bookings if it's on a track he excels at though? Jeppesen another option of a Champ guest if every Prem team is racing on a particular day. That's the advantage of not signing a replacement, being able to pick & choose depending on opponents / if it's a home or away fixture.