Replying to Hemel Price reduction?

Thinking of heading off to Hemel for a Friday session soon, looking at the prices and it is pretty damn expensive. I know if you're a member with ski club uk you get 55% off hemel membership but during term time I'm down in Portsmouth so would be pointless. I only go hemel during the summer but I remember last year (or maybe 2 years ago) they did a group package for a the 3rd? Thursday/Friday of the month, being a tad cheaper, do they still do that?

Will I have to pay £45 for a 4 hours session? :/