Matching one to many from one sheet to another, then copying

Difficult one for me to create a catchy title. Basically I have 2 worksheets that look like this:

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What I would like to do is take the description column in sheet one and match each of the numbers with the Number column in sheet 2 and then populate the xref column with the appropriate Reference number. ie:

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Not sure if that makes sense, but I hope you can help. Many thanks

Please can you put this in a workbook and attach it?

Attached. Thanks

Sorry, try this one

Try this:

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