According to Matthew Robinson on The Doctor Who Resurrection Of The Daleks DVD, Mower was the original choice for Colonel Archer (played by Del Henney) in this serial.
Became an Associate Member of RADA.
Graduated from RADA.
Location of birth sometimes given as Pontypridd, South Wales.
Mower's given date of birth of September 12th 1940 is called into question in his 2007 autobiography 'My Story'. His birth went unregistered by his family and he later found out he may have been born on September 12th 1938 or possibly 1939.