CrashCoaster
CF Legend
I've been browsing TowersStreet and those guys have all come to the conclusion that it is due to Merlin's budget cuts, close the attractions that are most likely to go unnoticed to save money (the two Intamin's both have heavy maintenance costs, Rita especially, representing 40% of the park's total maintenance costs). Most other parks with similar ride types to what Alton have reopened those attractions, proving it isn't necessarily due to social distancing. @Matt N, you are right about Thirteen requiring at least 18 riders per train, which are required for the ride to clear the second lift hill (which in my opinion is a design flaw).
On another note, Blade is back open.
On another note, Blade is back open.