Another cheap family voucher from Metro Radio offers page, but probably available from other associated radio stations (Bauer Media Group) around the country.
South Lakes Safari Zoo in Dalton in Furness, south lakes is really good, and worth a visit. And this family voucher allows 2 adults + up to 2 children for just £16 (normally £33), T&Cs below:
VOUCHER VALID UNTIL 31ST OCTOBER 2016
The voucher cannot be used in conjunction with any other offer
The voucher is not transferable
Opening times: The zoo is open every day 10:00 until 17:00. (Late opening until 6pm in August.)
This voucher cannot be used over Bank holiday weekends.
Please print and show on arrival to gain entrance
Voucher valid for 2 adults and 2 children (aged 3 - 15 years old) - any additional accompanying children will be charged at £9
How to redeem
PLEASE PRINT OFF VOUCHER AND SHOW ON ARRIVAL TO GAIN ENTRANCE
VOUCHERS DISPLAYED ON PHONES ARE NOT ACCEPTED
Same voucher (and terms) available for £13.20 from WishFM wesbite (thanks to jus1974 for the heads up)http://www.wishfm.net/vouchers/voucher/safari-zoo-435/