The play wot Ollie's in is in the main auditorium for six performances from 25th Feb until the 28th (matinees Fri and Sat); loyal Millbrookians might like to think about supporting one of their own and getting a ticket. Prices start at £12 for the Friday matinee, and max out at £20 for the best seats on Saturday night. Bargain.
You can read all about it on the Theatre Royal's website; tickets are also available from the link, of course. Well done, Ollie - hope you're enjoying the grind of rehearsals and that the show is a triumph.