I am using a formula
=((NETWORKDAYS(C2,I2)-1)*(Z$2-Y$2)+IF(NETWORKDAYS(I2,I2),MEDIAN(MOD(I2,1),Z$2,Y$ 2),Z$2)-MEDIAN(NETWORKDAYS(C2,C2)*MOD(C2,1),Z$2,Y$2))

this gives me working hours Mon-Fri (Y and Z = start and finish times)

now I need to incorporate bank holidays please can you advise what i need to
do to the above formula
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nigeo