Avro Factory
The Avro Factory at Waddington is still (I believe) to be seen on the other side of the A15 from Waddington. It is now an industrial estate but some of the old hangars are still there. One of the last aircraft to be assembled there was one of the Avro 707s.
Aries I was, indeed a Lancaster, modified for Arctic flights with the nose and tail fairings and all turrets removed. THe Lincolns were similarly modified. I am not certain but I believe Aries II (RE364) was in use at Shawbury and Aries III was flown from Manby, after Specialist Navigation training moved there from May 1952. Aries III certainly bore the title "Royal Air Force Flying College" on its nose.