silly dash question

[TOV1E]

I have the new convert, and still have not recived the handbook from tvr, the thing is when the fuel gets to 9 ltrs in the tank the green display below the 2 dials flashes every 4 secs, the first time it did this i went and got some fuel then it was fine, but today i stopped the car waited 5 secs restarted her and the flashing stopped.I dont know if this is some sort of warning light or a problem with the dash. Thanks in advance Gordon.

[Uncle Egbert]

I have no idea what it does mean, but it has never flashed for me and I have gone down to 6 litres several times so perhaps not a fuel warning (or at least not one that works on mine).
Maybe it just likes to Flash Gordon....