Bake-off star Prue Leith will help to launch a steam engine which has been lovingly re-stored by enthusiasts.
 
The TV presenter and chef will be at Didcot Railway Centre tomorrow to unveil a Saint class locomotive, one of the most important designs of the early 20th century.
 
These models were introduced by the Great Western Railway (GWR) from 1902 and served for half a century before being scrapped by 1953.
 
Now, the Great Western Society has rebuilt a Saint at Didcot, using a later version of the class rescued from a scrap yard.
 
Ms. Leith, who lives in the Cotswolds, was a member of British Rail's hotel company board, appointed by British Railways Board chairman, Peter Parker, in the mid-1970s.
 
She will launch the locomotive, which is called "Lady of Legend", at 11:15.
 
Celebrations will continue over the weekend with family attractions including an Edwardian trail and many visitors adopting Edwardian dress.
 
Former bake-off contestant Christine Wallace will be demonstrating Edwardian cookery.
 
Tom Williams.