After some help on this, can find examples on the forums where row
should be deleted based on X value. However, my requirement is:

Within Sheet1 contains x thousand rows, with data populated in up to
10 columns for each row. Based on Column C I need to delete any rows
within Sheet1 where the name in Column C is NOT EQUAL to a list of
names in Sheet2 Range Valid

For example

Sheet1
A: B: C: D: E:
123 Test Al Test Test
124 Test Mike Test Test
421 Test John Test Test
152 Test Al Test Test
242 Test Sarah Test Test
142 Test Tom Test Test


Sheet2
A:
Al
Mike
Tom

So in the above example Sarah and John don't appear within Sheet2's
range so I would want these lines deleting.

Appreciate any help as always.

Regards, Al.