However, in DUMPS_FIX_PACK_7_iNTERNAL_PSP-PLAYASiA they provided redumps for these two.
For Little Britain, the reason.txt is:
Reason: corrupted BOOT.BIN
Correct CRC: 3F604077
For Pursuit Force, it is:
Reason: bad dump (corrupted MAIN.PAK)
Correct CRC: 10B1AB5C
The dumps in the redump database are quite old (2009 and 2008), but the corruption looks weird - why would the same corruption happen for redump dumpers and scene dumpers?
Anyway, thought I'd mention it. Do what you want with this