Shelflife

Referees in Ireland
Blue have a sub hooker and prop. At half time they replace the hooker. 60mins and the replacement hooker is sin binned. Scrum follows and I ask capt to sort out FR. He says uncontested scrums as original hooker is injured.
I insist on sub prop to go in to hooker and we continue with uncontested scrum. 3.13.b
was I correct to insist that a suitably trained front row player goes into the front row when one is available even if it's going to be uncontested as he's not a hooker.
I insist on sub prop to go in to hooker and we continue with uncontested scrum. 3.13.b
was I correct to insist that a suitably trained front row player goes into the front row when one is available even if it's going to be uncontested as he's not a hooker.