whats the story on this aircraft?

Info from Aeroplane Monthly, May 1981 (paraphrased for brevity):

Silver City Airways was registered 25/11/46. Bought 3 new Lancastrians from Avro G-AHBW ‘City of London’, G-AHBT ‘City of New York’ and G-AHBV ‘City of Canberra’. They were used to link the UK with mining territories in South Africa and Australia, being based at Langley. G-AGHW was eventually sold to QANTAS (doesn’t say what date), for which see:

http://www.edcoatescollection.com/ac1/austcl/QantasFleet/VH-EAV.html

Simon