A series of complaints against Merlin Entertainments Group, the Poole-headquartered operator of Alton Towers, LegoLand and Madame Tussauds, over the advertising of its annual passes have been upheld by the Advertising Standards Authority (ASA).
The ASA received 22 complaints, covering five issues, about four adverts that appeared in emails and on the company's website in December 2014.
Two of the adverts, an email and webpage from 22 December, targeted existing pass holders reminding them that the passes ran out at the end of the year and offering reduced prices to renew.
The other two, from 26 December, targeted new and existing customers listing sale prices for passes, with the full prices crossed out.
The complainants challenged whether the adverts were misleading as the 22 December email suggested recipients had 14 days to renew their pass and qualify for the advertised prices, while the claim on the webpage stating the claim "Prices frozen for 2014" implied the prices advertised would be available for the remainder of 2014.
From 26 December 2014, pass holders found that the renewal price had gone up.
Complainants also challenged whether the claims in the adverts from 26 December were misleading because they were based on a price that did not reflect those at which the products were previously sold, and that the claim "the year's lowest prices" was misleading, because the same product had been available at a lower price earlier in the year.
Merlin responded saying the 14-day renewal period referred exclusively to the length of time remaining on the pass, not to the time the discount was available and that it had asked its agency to remove the claim "Prices frozen for 2014" from the website but this had not been done before 19 December.
Regarding the 26 December adverts, it said that the terms and conditions at the foot of ad stated "Savings are based on full UK walk-up price". It added that these adverts clearly referred to pricing in 2015.
The ASA upheld the first four issues as it considered that consumers reading the 22 December adverts would believe that the prices represented Merlin's standard renewal prices and would not be subject to increases in the coming weeks.
It added that consumers reading the 26 December adverts ad would believe that the crossed out prices represented the price at which they were usually sold and that that Merlin had not demonstrated that the implied savings claims were genuine.
It did not uphold a fifth complaint as it judged that the advert referred to prices available in 2015 and was not misleading.
The ASA ruled that ads must not appear again in their current form.
It told Merlin to ensure it "held sufficient evidence to substantiate its marketing claims, that it did not misleadingly imply that its prices were valid for a longer period of time than they were, and to ensure its savings claims were accurate and reflected a genuine saving".