I've been looking for a Power Tower recently and this is the cheapest I've found one, if you use the attached voucher. Unfortunately, this is a little too tall for my gym, but might be useful for you guys.
Use code "WINTER" to get 20% off. Delivery is £6.99 making this a total of £110.19.
"The new Bodymax CF360 Deluxe Power Tower can be used for a multitude of exercises. From Chin Ups, Knee Raise and diprs, the CF360 also has foot restraints to help perform sit ups. Made of strong, durable construction, the CF360 Deluxe Power Tower will help you achieve your fitness goals. 1100L x 1060W x 220H, Max Weight Capacity 115Kg/250lbs"