Yes, lockers can be found at Adventure Point Gift Shop.
There is a charge to use lockers, small lockers are £1 per hour or £5 all day and large lockers are £2 per hour or £10 all day. You can return to your locker as many times as you like within your hire period without incurring any extra charges.
Lockers are limited so be sure to get yours before you begin your wild adventure.