Is it true, as relayed by my client, that the Romanov family were not murdered, but rather escaped to England?

This is not true. There were clear accounts of what took place. There was much forensic evidence as well. While there was a disruption of communications and no one wanting to talk about the sordid details, which serve to cover things up and blur the historical record because the facts were very few that could be conclusively determined, this led to much conjecture that continues to this day. The story he is seeing and responding to was a false channeling and can be disregarded.