Sky voice control commands previously used, not recognised

[David-D]

Voice commands previously used are not being recognised. Has something changed?

For Instance.

Voice command previouly used - one, two, three (to change channel to 123). Not recognised.

Voice command used instead - one hundred and twenty three.  Correctly changes channel to 123 and so on. 

Calling out programe names instead of channel numbers not recognised either.

Appreciate any help with this.