Its a 25% discount for a concession ticket, that's the same as current.I had a similar scenario, so I ended up ringing a number someone provided on here. The rigmarole once I had contacted them was frustrating to say the least.
Their pricing structure for children in hospitality is questionable at best, and that's after struggling to even get a price that's less than an adults.
I sorted mine March last year. As a current hospitality member, we were given 1st choice. Not sure what the issue is with that, only the same as current season ticket holders getting 1st option over non-season ticket holders.