(Yesterday, 7:56 pm)V514DFT wrote Wasn't there talk of looping the Northumberland Line round to meet the ECML at Morpeth at one point

It's one of SENRUG's campaigns, but I don't think it's grown legs beyond that stage - https://www.senrug.co.uk/NorthumberlandL...orpeth.php

It would be a relatively simple one to achieve, but I suspect the barrier is the traffic on the ECML already. Unless they ever went down Gareth Dennis' suggestion of a Morpeth curve, I'd suspect they'd need to try and fit a bay platform in for it.