Okay a biggie from me.
Basically the plan is, as the T&W Metro cars become life expired, integrate the system back into Network Rail.
Order new 4 coach dual voltage units, for both standard 25kv AC and the metro's 1500v DC.
The shared tracks with Netwrok rail are re-wired where necessary to 25kv in order to create an electrified route from Newcastle - Stockton - Yarm - Northallertton, with a stub to Middlesbrough. Plus electrification to Hexham.
The Metro is extended from South Hylton to Washington, and also from Washington up the Leamiside line in order to create a southern loop.
The Metro, now merely an electrified suburban service, is also extended onto the freight lines of south Northumberland, to Blyth and Ashington.
Ideally the frequency along the core current Metro line of Pelaw - South Gosforth could also be increased.
Therefore the Tyneside/North east electric services would be:
Middlesbrough - Newcastle Central - Newcastle Airport
alternating with
Middlesbrough - Newcastle - Blyth - Ashington
South Shields - Newcastle - Coast - St James (as present)
alternating with
South Shields - Newcastle - Airport
Ashington - Bylth - Newcastle - Sunderland - Washington - Newcastle - Blyth - Ashington
alternating with
Ashington - Blyth - Newcastle - Middlesbrough
Hexham - Metro Centre- Newcastle - Walker - Coast - direct to Airport (creating running lines through South Gosforth depot)
The current Metro Centre - Morpeth would be started back from Hexham and all electric
The Middlesbrough to Hexham services would be all electric, save for those extending to Carlisle.
Big plans, but you never know...