YorStox have released the following statement regarding the meeting originally scheduled for Sheffield on Sat 2nd November:

SHEFFIELD 2nd NOVEMBER - CANCELLED! 
YorStox regret to announce that Sheffield on Saturday 2nd November has been cancelled due to unforeseen circumstances.

There has been an alteration of formulas therefore appearing at Bradford on Saturday 2nd November. This event now features BriSCA F2, 1600cc Bangers, Lady Bangers, Reliant Robins AND and HUGE Firework Display.
YorStox apologises to Heritage F2 and V8 Hotstox who no longer are appearing.

For those who have purchased tickets for Sheffield, please contact Tracey@YorStox.co.uk to organise your refund.

Don’t forget tickets are on sale still for Bradford on Saturday 2nd November Firework Event! 
Thanks for all your understanding 
YorStox Management Team

As a result of the Sheffield cancellation, the season-long YorStox Whites and Yellows series will see its Championship Final staged at Bradford on 2nd November, where HiFly tyres courtesy of Entyre Supplies, and additional prize-money, will be up for grabs. The meeting format depends on the number of cars booked, so watch this space.