Nah - the scary bit is being in a zero-vis fog hammering towards Harpenden on the DF at 100.....when the Sig has told you to get a move on as there are 2 HSTs catching you up.
And I'm sure you DO know where ALL the signals are between St A and Harpenden, don't you ?
(Only kidding mate, you take as long as you need - The choice between an Overrun or a Please Explain is a no-brainer, as well as the fact that if you did mess up it would cause much greater delay).
Enjoy, as they say, & welcome to the 'Midland'.
For myself, I just can't wait to meet the Catford 'posse'.