Hi

the hand books do rec either  60k or 80 k depending on the chassis
break...Vauxhall in their wisdom had a few instances of belts breaking
prior to the rec so they said that in their opinion the belt and
rollers should be changed every 40k... the fleet companies now all
change at 40k,  also if you ever get a noise from the water pump area
STOP  this can throw the belt.......

Some corsa's were chain driven so check to see that you do need
one.....

Val