I would like to format a number if <10, to show 1 decimal place, if =10, no
decimal place and with red colour for negative numbers.

e.g.
1.24 to show as 1.2 (numbers in black)
10.6 to show as 11 (numbers in black)
-2.63 to show as 2.6 (numbers should be in red to denote negative)

I am trying to avoid using functions in the cells itself.