I will post up what I have found to date from other sources.
The two men departed Fremantle on the SS Orion in July of 1950. McTaggart actually met his future wife to be, Jan, one this voyage. The aircraft was purchased from Shackletons and then numerous weeks were spent organising the coming flight. The British Air Board would not approve Frank Burt's Private Licence so they used Lachlan McTaggarts as he had been trained by the RAF during WWII. They based the aircraft at Redhill.
On a test flight to Ireland, the engine failed near Cambridge and subsequently landed in a paddock near a village called Panshanger. The local Plod thought that they were carrying contraband, so a long day was had and the two ladies accompanying them were not impressed.
More soon........ any bells ringing