Viscount812 (Post #46). I haven't see "The King's Speech" so don't know what aircraft you were referring to.
I believe the first "Royal Flight" aircraft in 1934 was DH84 Dragon G-ACGG (Ser No 6025), which became VH-AAC, then RAAF A34-10 from 1941, became VH-AAC again and spent many years in Papua New Guinea.
I have a photo of G-ACGG with the Duke of Windsor (Edward VIII) at the controls. The polished wheel spats apprear to be embossed with Crowns!