Here goes. I am trying to design a spreadsheet for the purpose of
automatically sorting racing heats. Racers for the meetings vary
between 30 and 40 drivers. Each Driver will race 5 times in the day.
There are 6 Drivers per race. Each driver will race all the other
drivers (where permutations allow) and not race the same person twice.
It is important that no racer has back to back races and the races
each person participates in are as evenly spread throughout the day.
Ideally the answer would be in the form of a spreadsheet/ Although
text will suffice with each
Persons/Racers number showing its corresponding race number.

The pricing is based on the possibility an ancient greek maths genius
has already found a numerical sequence that would fit this  : )
If this is going to take considerable time then please let me know and
I will evaluate raising the price.