Good evening
I'm currently undergoing a crash course in power Apps and i've run up against a brick wall. one of the tutorials wants me to input the following formula to put the prefix '£' infront of a number to reflect the currency (obv) and it's utterly refusing to work. any insights would be appreciated, i've had a number of formulas 'fail' today with this same error msg and a seemingly sound expression.

(ThisItem.Price, "£##.00")
Formula from tutorial =

the only thing i've changed is i've subsituted the $ for a £, and i've tried replacing the , for a ; encase i've got a language/region issue but it had the same result.
fingerscrossed someone has a min to help