I think it was G-AOVF. After Donaldson went bust it was stored at Coventry in July 1972 before being sold to IAS on 31.10.1972. IAS leased it to African Safari Airlines on 1.11.1972, but something went wrong and it was "returned" to IAS on 19.12.1972 and operated by IAS Cargo Airlnes until 2.11.1978 when it was sold to Invicta International. The story had become a bit of a legend by the time I joined IAS in 1974.