I found out we actually have the default English (UK) keyboard. Tried to change this, by going to Settings | Keyboard only to find this list:
Spanish (Spain – International Short)
I don’t have an option to change to English (US) *at all*
This could possibly be something the OEM has done on request from the distributor channel (in this case Vodafone). Vodafone probably sourced the HTC Trophy in the UK for all its subsidiaries, which include the ones shipped to AU/NZ...