Thanks very much Jac,
lsmod shows the modules loaded ok. Dmesg gave an interesting clue:
rtl8192cu: Chip version 0x10
rtl8192cu: MAC address: 00:13:ef:30:30:7e
rtl8192cu: Board Type 0
rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1
rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
usbcore: registered new interface driver rtl8192cu
rtlwifi: Loading alternative firmware rtlwifi/rtl8192cufw.bin
rtlwifi: Firmware rtlwifi/rtl8192cufw_TMSC.bin not available
I raised a query on the Multitech forum yesterday, and will pursue a list of compatible adapters. We won't be the only ones keen to connect over wifi. I'll update here and the wiki when I get an answer.
Thanks for your help, Mark