Once you get it rolling you steer it with the throttle
The pedal however may not be where you expect it to be.A lot of cars this age had a centre throttle pedal.
MGs were always neat efficient and handled well, This is a different approach to going faster.
Here is another car cut from the same cloth
http://www.classicandperformancecar.com/features/octane_features/275692/driven_fiat_mephistopheles.html
I rather like Fiats, the a/c compressors may not last very long but the throttle response is always razor sharp, and thats a little bit of the DNA forming that character.
When these aero engined monsters got this scary the FIA "solved" the problem with the 750Kg weight limit, which led to the lightweight anf even faster German "Silver Arrows" . The most terrifying of which was the wild and deadly Auto Union , now part of Audi.
http://www.autounion.org.uk/
Bernd Rosemeyer was killed in one on a closed autobahn setting a land speed record
You dont get a hinterland like that with a Toyota avensis