The Sun newspaper is currently offering a 2 for 1 voucher for Chessington World of Adventures along with other various UK attractions including SEA LIFE centres and Santuaries for visits until July 31, 2013.
Each voucher entitles the bearer to one free ticket with every full paying adult. One voucher will appear in the Sun newspaper between Saturday January 19, 2013 until Saturday 26, 2013.
To qualify for this offer you need to cut out the voucher and hand it over at the ticket booth.
For full details see the voucher in the Sun newspaper.