Cressida Bonas: Everyone seems to have very strong opinions about my wedding

White House Farm began last week on ITV; a six-part factual drama about the notorious murders. I play Sheila Caffell, Jeremy Bamber’s sister and one of the victims. She was initially thought to have committed the crimes, and was described in the tabloids as ‘crazed’ and ‘deranged’ — an unfair portrait of a mother who was suffering from schizophrenia. I hope people who see it understand the turmoil she had to go through in life. There’s a lot of talk about mental health these days. Researching the part, it occurred to me that we have as a country become much more understanding on the issue. That’s a good thing. I hope Sheila’s reputation is repaired.

Getting to know Sheila’s ex-husband Colin Caffell, who supported the show, was an honour. It’s remarkable how he has managed to overcome the devastation inflicted upon his family by Jeremy Bamber (played brilliantly by my friend Freddie Fox).