(17 Apr 2019, 3:21 pm)Dan wrote Interesting - I suppose the burning question therefore is which indiGo services are being upgraded, and which ones are being downgraded?

If the North Tyneside examples are currently being fitted with USB sockets, it's an upgrade above the current high-spec indiGo.

I could see a frequency increase on the 81/82/83 & 84 between Concord and Harraton to every 12 minutes with an interworking on the short boards at Concord with the 85/86.

The current 82/84 board would remain as it is between Birtley and Heworth.

Elsewhere in the Indigo Network I could see the upgraded spec of usb's on the 206/208 and 265 with them all going into Durham.

North Tyne I will stick with my theory of the 19 getting Solo SR's.