AAIB quote: "the Autothrottle demanded an increase in thrust from the two engines but the engines did not respond".
An observation only: Occurring only 2 miles from touchdown at 600', is this not totally unique in commercial aviation?
Do you mean is the requirement for thrust at this point in the approach "unique"? No.
If you mean 'Is it unique for the thrust not to be supplied when needed?'. Probably. I've not heard of any other crashes matching this scenario.