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The patch you need depends on your publisher, you can find out who they are by lookinging at the logos on the CD. There should be Paradox and one or two others, tell me the other ones and I can direct you to the correct patch.
Good that you did not follow the advice given since he gave you the link to the NA patch which would not have worked for you.
You have the UK version. So you DL the correct patch.
Install 1.05C, rename your AVI folder to AVI_back and set your color depth to 16BIT.