I usually leave a message on their website. Link at the top of this page. Or if you think it is more urgent give them a ring. (Fay is probably the best one to speak to, but isn’t always in the office). I have usually found that I get an email reply fairly quickly (I don’t mean just the acknowledgement one which is virtually instant) and then you could send it via email if it isn’t too big.
Apologies again for misunderstanding what you were saying. Put it down to having had to reload my computer for the third time in 2 days – always a bit brain frazzling, I find!