Heidfeld was given the race seat on 16 February 2011.
Gené got his big break in 1999, occupying a race seat with the Minardi team.
At various times during this time he was linked in rumours to a return to a full race seat.
He felt that finding a race seat would be easy with Formula One experience but no teams took any interest.
HRT have not yet announced who will occupy their second race seat.
A driver who pays for his race seat rather than receiving a salary from the team.
However, Davidson did not secure a 2010 race seat in F1, and instead turned his focus to racing sports cars.
In a fair world, di Resta would surely keep his race seat.
Following this he won a full-time race seat with the team for 2008 and was retained for the 2009 season.
And despite all the attention to practical details, it's still a race seat.