Just had word that the BBC has cancelled the shooting day tomorrow (29th Oct)

Apparently one of the main actors is unwell and not able to be on set - (obviously not a real motorcyclist then!). They (the BBC) apologises profusely for the cancellation. 

However, the other shooting day is still on (4th November) so would the riders who have agreed to appear please keep that free.

It is possible that days shoot may also be cancelled (you never know - another actor may stub a toe or something)

Such is the price of (potential) fame