Hi Unixman
There are indeed plenty of amputee pilots in the UK.
There are also plenty of organisations with access to aircraft with hand controls.
Three that spring to mind:
APT based at Old Sarum -
www.disabledflying.org
The British Disabled Flying Association based at Lasham(?) -
www.bdfa.net
Freedom in the Air based at Cranfield -
www.freedomintheair.org
Hope this helps
Regards, jez