Yes, clearly a typo.
But a typo that leaves the intended meaning somewhat in doubt.
What do they mean by a 'material change'?
Presumably meaning that at the end of the day they will be liable for a big whack.
But it could also mean that at the end of the day there will be no liability at all.
I think they probably mean that at the end of the day, they will more likely have a sizeable liability than not.
But I'm only guessing.
I shall have to stop pedantically picking them up on these grammatical faux pas, because in the scheme of things, this tax issue is somewhere between small fry and a vegeburger, whatever the statement actually means.
So all good really, other than the Covid-related stuff, (which is preventing UK Specials currently), and Covid-related stuff shouldn't be laid at their door, or used as a hammer to bash them with.
But hard datalock is what will ultimately bring a collective sigh of relief.