Wow - that takes me back. I remember getting the brochure for one of those when they first came out when my dad was buying an escort. I thought they were AMAZING until the Cosworth came out. That one looks mint considering the rust-buckets most must have become.
It doesn't have the larger tail fins of an A55 Mark II or a 15/60 so I'd concur with the suggestion of a Series VI Morris Oxford or possibly a Wolseley 16/60.Its a Farina design- likely an A 55 Austin Cambridge/Morris Oxford /Wolsey 15/60***/ Riley 4