Joely Richardson feels “mighty thankful” to have enjoyed a final family holiday with her sister Natasha just weeks before her death in 2009. The actress died in March 2009 after sustaining a head injury in a fall during a ski trip in Canada, and Joely has now revealed she headed off on a sunshine break with Natasha and their mother Vanessa Redgrave shortly before the accident and she is grateful to have been able to spend that time with her. In a post on Instagram, Joely shared a picture from the trip and wrote: “I came across this yesterday and it made me smile. Mum, me and my sister Tasha. “…