Yes , you can let say you want Page "x" of "y" , where "x" is the current page and "y" is the total number of pages.
Insert a Current Page Number marker for "x", and insert the Last Page Number text variable for "y" (choose Type > Text Variables > Insert Variable > Last Page Number).
This worked perfectly, thank you
Only thing I had to do was create a "Last Page Number" text variable first (hadn't had any up to that point) and I could then insert the last page number. Compiled PDF now shows page 1 to 24, 2 to 24, etc.
Many thanks for your swift reply.