Geoff, the little relevant bit off Wikipedia in case you didn't already know. Supports your theory of those six being on the same aircraft or maybe even two?
In February
1943 454 Squadron moved to
Amiriya in
Egypt, where it joined
201 Group of the RAF's
Middle East Command. Having left its Blenheims in Iran, the squadron was equipped with
Martin Baltimores. It commenced operations as a maritime patrol squadron and spent the next 17 months working in this capacity over the
Mediterranean - its main targets were enemy submarines and merchant shipping. It was also used for long-range reconnaissance and
occasionally employed in strikes against land targets in Crete and the
Greek islands. During this period 454 Squadron operated from several airfields including
Amiriya,
Gambut III, and
St Jean and
Berka III.