KOL in UK

I've read somewhere that you need to leave at least 2 days between the test and making an application for ILR. But what I would like to know is, is there a maximum time limit? In other words, how far in advance can one take the test before making an ILR application?

Cheers,

Sarge.

As early as you want to because there's no expiry date for the test.

Thanks for the reply. Much appreciated!