The British Steam Car Team is on course to break the steam-powered land speed record tomorrow (Thursday).
The team has been performing final test runs at the Edwards airforce base in California ahead of its record bid in its steam-powered car, "Steamin’ Demon".
So far it has logged its best average speed at 137.4mph - well ahead of the current record of 127mph, set in 1906 by American Fred Marriott in his Stanley Steam Car.
However, the speed record will only be officialy ratified if observed by FIA timing officials, who have joined the squad today.
The FIA has strict guidelines as to how to qualify an official land speed record, with an average speed being taken from two runs across the same land area within 60 minutes of each other.
The team hopes to eclipse 146mph and beat the American national record of 145.6mph, which is not ratified as a Guinness record because FIA officials weren't present.
The record bid is led by power boat racer and entrepreneur Charles Burnett, who already holds a Guinness-approved world record for having set the offshore water speed record of 137mph in 1999.