[Jamie2k9]

Just out of general interest, could Glassnavan junction be reconfigured to allow Drumcondra bypass access to the tunnel. Long term surly something like this would be required as service levels will increase long term. While DART underground will happen at some point, this could be needed at some stage or will both lines feeding into Connolly restrict.

I don't know the junction really well but couldn't the embankment between Sligo and tunnel line be knocked and crossovers moved West to connect both lines.

Operationally I think it could be an impotent part for Heuston services as while not overly common services get suspended through Drumcondra for various reasons so I don't think suspending Heuston services is acceptable while it may not be often.

Perhaps could benefit Heuston bypass Drumcondra and Maynooth/Sligo left as they are but Connolly could be the problem.