starting from cold takes longer to fire up

[s2_bo]

Since about a month or so my 8 has started to need more cracking to fire up on a cold start.

Happens every time it starts of it hasn't been on for 12 hours or more.
Takes about 5 - 6 seconds to fire up and once its been on it only takes 2 - 3.

Any one else had this issue? or know what it could be, I'm not really to bothered at this stage but obviously want to get it sorted if its something that could stop it starting all together.