RIP David, Richard and the others involved in this tragedy.
I remember David from the first time I went to a motor race - BTCC at Oulton Park in 1995 when he was driving the Honda Accord. Richard Lloyd also had a massive influence on the Super Touring era, running the Audi BTCC squad and then the Bentley Le Mans victory in 2003.
My thoughts are with their families and friends.