I did a Westbury - Waterloo - Westbury...
Up train was the 1118, left Westbury about 20 mins down, arrived Waterloo, via Richmond, 20 mins down, about 1415 or so. Left Waterloo 1445, 12 mins down, (I'm asssuming after the pilotman's
PNB▸ as he was last to rejoin the train), went round via Brentford and Hounslow, arrived Westbury again about 20 mins down at around 1715.
Good value on a route Warminster/Salisbury Super Offpeak Day, less than ^20 with a suitable railcard. If only my Network Card was valid in the 'wild west'...
Paul