Remove metal flue liner before blocking?

[jtag]

We've had a gas back boiler removed from our 30s semi, leaving a metal flue liner dangling, with fibreglass insulation sealing around it. At the top is a gas terminal.

Does the metal liner need removing before sealing off the bottom (+ adding an air vent)?

Is the gas terminal sufficient to cap or should it be removed and capped?

 

[Alastairreid]

My own has been redundant for 20yrs with the liner, gc1 cap still in place.... bricked up and vented in livingroom....no problems.