Skipped last year so going this year to have a nose around.
Riku and I are going up on Thursday 14th Jan if anyone wants a meet up. Will be there lunchtime till around 5.
Tickets and info: http://www.autosportinternational.com/trade/
MSA promo code for reduced entry fee and access for Thursday if not trade is: MSA1616 but you do also need to enter a competition licence number at some point and possibly show it on the gate (a 2015 one would be fine) although I have never been asked before.
Otherwise, I am sure one of the trade members on here will allow you to use their trade details to get a ticket? If not PM me and you can use my details.