I would call Jenkinsons directly. I cant imagine they don't offer a discount. I've seen loads of camp buses and school trips go to the aquarium.
They offered individual senior discounts so definitely a possibility for a group rate
When I was there they was saying something about group discounts but i wasn't really paying attention to it for all the details
No idea, I'm not sure you can call them direct to inquire.
I don't work there, I just visited them once, so I have no clue!!!
Thanks! Your answer is awaiting moderation.