That's a good question. It does seem odd. As you say, 1.2 million visitors is a lot, even if it represents a fall from the peak. You are right in saying that the Splash Canyon accident, flooding and Covid were all factors, but clearly not the only ones. Drayton Manor's rides from the 90s and early 2000s seemed to be very successful. Some of the more recent ones a little less so. Excalibur was very creative and different to anything else in the UK, but was a technical challenge and didn't last for long. After the success of Thomasland they tried to do it again with Cartoon Network and Ben 10, but that too doesn't seem to have had the longetivity. At the same time, most of Drayton Manor's investments have been sensible and well thought out.
If you're comparing Drayton Manor to places like Toverland, Plopsaland and Walibi Belgium, Drayton Manor does have the zoo. Animals are quite expensive to keep when you factor in the animal food, zoo keepers, vets bills and the heating bill. Plopsa has the advantage that they own the rights to their own properties, and aren't having to licence a brand like Thomas. Drayton Manor is open for a lot of days each year. I looked at going to Walibi Holland before Covid and it was only open weekends and school holidays for a relatively short season. Drayton Manor gets a lot of visitors, but it is open most days during the season, as well as Christmas and February half term. To be fair Toverland and Tripsdrill are open daily through the seasona and for quite long hours, but Drayton Manor's attendance isn't as impressive when you look at the guests per day.
Drayton Manor may have got backed into more of a discount model than some other European parks. That's been a problem for the UK theme park industry. Although it's changed a bit recently, Merlin has done a lot of discounting with BOGOFFs and the Merlin Annual Pass, which has arguably dragged down the price of theme parks in the UK. Theme park prices are also a reflection of what people can afford. Although the UK is a G7 country, when you adjust for GDP per capita we're about the 14th wealthiest country in Europe and the 42nd wealthiest country in the world. We'd be lower than that it you took away London. Parks like Toverland, Plopsaland and Walibi Belgium are in countries with stronger economies. The UK is also the second most inequitable country in Europe after Portugual. Our weak economy and high inequality effects the prices theme parks can charge. In the UK a lot of wealth is also locked up in the property market, giving people less disposable income.
I suspect a bigger portion of Drayton Manor's attendance is from school groups compared to the theme parks in most other European countries. School groups typically get big discounts, so that would also give Drayton Manor a relatively low yield.
I'll tell you what I don't think it is. I don't think our theme parks are struggling because of the minimum wage or our employment laws. We actually have some of the weakest employment laws in the developed world.