In the attached zipfile, several of the pdf's have the same CODE & UNIT, but different dates:
                                COUNT
CEN	EAP1	CEN EAP1	2
CEN	EAP5	CEN EAP5	2
CIO	BL1	CIO BL1	2
JOR	BL1	JOR BL1	2
LIV	L2	LIV L2	2
LON	BL1	LON BL1	2
LON	L1	LON L1	2
I think I have a fix, but it'll have to wait 'til tomorrow