vauxhall corsa 8v 1997 - timing belt alignment - smp

trying to change the water pump on my vauxhall corsa 8v 1997. while I was trying to undo the crank pulley the cambelt slipped and now I suspect that the timing is now out. Is there any marks or ways I can check to see if the timing is correct??

I now know I should have marked the pulleys but didnt realise that the cambelt would slip on the crank pulley.

please help, thanks..

vauxhall corsa 8v 1997 - timing belt alignment - cover77
Trying taking bottom pulley off there should be a mark on the cog I think it should be pointing at the 6 or 12 o'clock mark hope this helps