I must be the only person in PPRuNe land not to have been aware of this accident till I saw it on R&N just now. Thoughts are with the people involved including the lorry driver.
I used this road regularly when I lived in Staines and worked at Heathrow it was always a dangerous road and given the Heathrow expansions I am amazed they have not improved it and or traffic calming measures
Obviously given the difference in vehicle size speed may not have been a reason for the deaths but is a disaster for all family members
Blue sky's all
K