CAA approved calulator recomendations please

[Dicky Birded]

Hi,

I want to get a CAA approved calculator.
Their website states it should be scientific, non-programmable, non-alphanumeric without specific aviation functions.

Searching on the web Cranfield recommend the Casio fx-85WA, but this appears to have been discontinued.

Have anyone bought a calculator recently and can recommend one?

Thanks

DB.