For U.K. must use these files:

EROM CID52:

1. K800_R8BF003_MAIN_GENERIC_WI_RED52
2. K800_R8BF003_FS_EUROPE_4_RED52
3. HB1-06_Generic_CDA102568_13_R4A_GENERIC_EUROPE_4

EROM CID53:

1. K800_R8BF003_MAIN_GENERIC_WI_RED53
2. K800_R8BF003_FS_EUROPE_3_RED53
3. HB1-06_Generic_CDA102568_12_R4A_GENERIC_EUROPE_3

Full unlock (not patch unlock) with Omnius - it's free.