Late P35 Penalties

Seriously annoyed with myself. My fault. Missed one client's P35. Ah well, my fault and I'll pay the fine.

Out of interest, for as long as I can remember, there was a 6 day (i think) "grace period"? So, if you submitted before 25th (i think) then they would not charge the fine but it would be classed as late. I can't see that on the P35 this year - so has it been withdrawn?

Do you still get the £75 incentive payment even though P35 is late?

This is the first year in 18years I have ever missed any deadline. Grrr. Very annoyed at myself.

Incidentally, as this is the first time this has happened to me, obviously I'm going to pay the fine. But would you just pay it and that's it, or would you write to client telling them of your error and that you've paid it? I feel I should tell them, apologise for my error and tell them I've paid it / am going to pay it. What do you think?

Many thanks.
paul