Didn't Vic Norman's dad operate an Ambassador as a mobile slot machines demonstrator for a bit in the 1960s, or was it a Marathon?
Edit: found it! It was a Marathon, G-AMGX! Answered my own question...
https://cwsprduksumbraco.blob.core.w...ger/G-AMGX.pdf
https://www.bal-ami.com/about-BAL-AM...i-history.html