This from
www.railtourinfo.co.uk
Saturday 28th Belmond British Pullman
2 x 67 (DBC)
Penzance Taunton
Taunton Minehead
Minehead Taunton
Taunton Penzance
Also, keep an eye on
http://www.sixbellsjunction.co.uk/10s/ht2018.htm as the full info including locos & stock used is usually posted, but can take a while to be added.
Tony