If its anything like its performance on the swanage belle on monday it will be going very slowly and delaying many service trains!
Okay the 455 delayed us by about 13 mins, but we overstayed our station stop at Slough by 7 mins as the crew could not release the brake. Between Southampton and Wareham we were over an hour late. Arrival in to Swanage was only so reasonable because transfer from nr to the swanage was timed with very generous pathing allowances and because the swanage railway sacrificed their scheduled services to let us in.
I stand by my previous comments either the crew or the loco were very average.