PETERBOROUGH number one Jack Holder will miss the SGB Championship Fours tomorrow - with the blessing of club bosses. The Australian ace had been due to lead the 'T Balfe Construction' Panthers quartet in their challenge for honours at the East of England Arena, but he has instead been given permission to race for Torun in a vital Polish Ekstraliga fixture. Holder was initially allowed to race for the Polish side last Sunday when making a sparkling paid 16-point debut in a defeat at Leszno. Torun have turned to the 21 year-old to replace world champion Greg Hancock, who faces shoulder surgery. Peterborough bosses have since been involved in discussions with their Torun counterparts for several days with a decision which benefits all parties eventually being made late last night. Promoter Ged Rathbone said: "We have agreed with Torun that Jack can race for them tomorrow. "We have to accept that we are simply a stepping stone in the career of a brilliant young rider. "Jack has been a model professional from our very first phone call to him during the winter. He loves racing for Peterborough and he has already indicated that he wants to be back with us again next year. "We feel as a club that after last night's result in which Sheffield won at Edinburgh, we will not now make the SGB Championship play-offs this season. Granted, it's still mathematically possible, but we feel it is a slim chance at most. "Ourselves, Torun and Jack have come to an agreement that suits us all. Torun did initially ask us to release Jack for the rest of 2017, but the rider himself refused that. "Depending on Torun's results, we will continue to assess the situation going forward. We may be prepared to allow him to race for them on two further Sundays when we ride at Newcastle and Scunthorpe. "I fully understand that some of our supporters may be disappointed that we are without Jack tomorrow in the Fours, but I ask them all to understand that the deal we've done is beneficial to all parties. "I'm not going to expand on that, but I urge them to trust my judgement as they've always done since I stepped in to keep speedway going in Peterborough in late 2014." Bradley Wilson-Dean will now step into the Peterborough team for the SGB Championship Fours along with Chris Harris, Paul Starke and captain Ulrich Ostergaard. Simon Lambert now acts as their reserve.