These are the articles in question:
Chaddock, D. H. (1950-51). An experimental steam turbine plant – Parts 1-5. Model Engineer 103 (2587): 966 -969; 104 (2589): 17 – 22; 104 (2590): 55 – 58; 104 (2591): 110 – 114; 104 (2592): 126 – 130.
The blade milling apparatus is in Part 1.
Happy to send a scanned copy of the article if you send me a personal message.
Mike