Last year? What about the year before that and then the year before that??
Considering all the new hardware which has opened in the UK in the time since 2021, I think global supply problems were not the main issue for delay with Valhalla, just they used that as an excuse. I think Merlin will be very aware of this, well I know they would be well aware of this, as they haven't had 2 year delays for hardware, like everywhere else in the world really.
There are delays yes, but not to the extent being made out by lady Mandy. Personally, if there is a delay to the new Haunted House, I cannot see it being a significant one.