Hi Steve,
It probably was marked as WFU Steve but it is not marked as such now. I think it was X in Dubai who reported it back in service.
A31EBF decodes to N30UD which is now AP-PFL, Cessna 525B CitationJet CJ3, c/n 525B-0131, Pak-Arab Fertilisers
A423AB decodes to N366MB, Bell 412EP, c/n 36497, new registration and operator unknown to me
Thanks
Alan