Just in case anyone else reads this with a similar problem a pal has just shown me the light.....
For example, the date in question is in column A1;
In B1 use the formula =TODAY()-A1 to give a number;
Then highlight A1 - Conditional Formatting - New Rule - Use formula to determine..... and insert the formula =AND(B1>(0-1000),C2<7) and select the condition (ie fill colour = red).
Whenever the date in A1 is within a week of expiring (or, indeed, has expired by anything up to 1000 days) it will then turn red. Also note the 'B' column in the example could be hidden from view to keep the spreadsheet tidy!
Cheers
Adam
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