Many thanks, Blackeyedshepherdsbringsheep, ColdTeaAgain and LillianGish, it's all coming back to me now - yes Rob was the one who suggested Canada, presumably hoping that Tom would have a terrible accident there and the family heirlooms would pass straight to him! And yes, it was Tom's stag do where he was rotten to Kenton.
The combination Helen needs to see (but won't now that she won't be trusted to see anyone by HRH) is that of Kirsty and Usha!