JET petrol stations are offering 2 for 1 vouchers when spending £20 from Apr 15 - May 27, 2011. Vouchers are valid at Alton Towers, Thorpe Park, Chessington World of Adventures and Legoland Windsor along with other Merlin attractions including Warwick Castle, Madame Tussauds, Legoland Discovery Centre, The Dungeons (excluding Blackpool) and Sealife Centres/Sanctuaries.

The list below shows when the vouchers can be used:

• Alton Towers - valid till 04/11/2011 (not valid July 19 and 29, 2011)
• Thorpe Park - 06/11/2011 (not valid April 22 - 25 and October 22 - 31, 2011)
• Chessington World of Adventures - 31/10/2011 (not valid on Zoo days)
• Warwick Castle - 31/12/2011
• Madame Tussauds - 31/12/2011 (not valid in August 2011)
• Legoland Windsor and Discovery Centre - 31/12/2011 (not valid in August and on park closed dates 2011)
• The London Dungeons (excl Blackpool) - 31/12/2011 (not valid October 29 - 31, 2011)
• Sea Life Centres/Sanctuaries - 31/12/2011

Please note: the tickets are not valid on Christmas Day at any park/attraction.