when you go to click 2 (the one brfore cranking) on the ignition, do you hear the fuel pump run and the idle valve click? if you go back to 0 then back to click 2, does it do it?

could be the engine running relay failed in the fusebox or come loose, a failed imobilser, or coroded multiplugs, this is what happened 4 times with mine - after doin each of the above and it doin it again, it was " this " close to being set fire to cost me a few hundred quid in new bits beofer i found it was the multiplug wiring under the bonnet near the ignition coil