Smith added 28 runs before becoming a rare Grant Flower victim and Marillier despatched Nick Pothas for 16 before late fireworks by Kenway and Mascarenhas.
The Lib Dem leader Nick Clegg was present as were four members of the Hacked Off campaign group whose leading light, Hugh Grant, describes as "a few dandruffy professors...a slightly insane chess champion ex-Lib Dem MP and a couple of threadbare lawyers".