https://www.bbc.co.uk/sport/formula1/54319543
How did Hamilton get it wrong?
The rules Hamilton was determined to have broken were in two separate places - the race director's event notes and the sporting regulations.
The event notes say that "practice starts may only be carried out on the right-hand side after the pit exit lights" and that "cars may not stop in the fast lane at any time the pit exit is open without a justifiable reason (a practice start is not considered a justifiable reason)".
The sporting regulations add that in the pre-race period drivers must "use constant throttle and constant speed in the pit exit".
As he approached the spot where drivers do their practice starts, Hamilton told engineer Peter Bonnington over the radio that there was a lot of rubber down there.
He had been told to try to find a spot a little further forward, with minimal rubber, to better reflect conditions on the grid, so the car's electronics could be tuned more accurately.
So he asked if he could find somewhere else with less rubber and was told he could. The pit lane in Sochi is particularly long, and Hamilton drove right to the end of it, just before it joins the track, before stopping to do his practice start.
This was not quite what the engineers had intended. Chief engineer Andrew Shovlin said: "Lewis asked if he could go a bit further. We hadn't realised quite how far he was he was going to go."
They did not see the first start, Shovlin said, adding: "When we saw the second one, we thought: 'They're not going to like that.'"
So, it turned out.
--- SBBSecho 3.06-Win32
* Origin: SportNet Gateway Site (24:150/2)