Hi Ian
I've bought the 4-Park 14-Day Flexi-Ticket for next year which covers entry to Universal Studios, IOA, Seaworld and Wet N Wild from Virgin with 10% discount because we are Frequent Virgin Club members.
I'm sure others will come up with slightly cheaper deals but I like organising everything with one agent - less hassle and Virgin are unlikely to go bust IMO.
Best wishes
FloridaLol