(02 Jul 2021, 4:53 pm)ASX_Terranova wrote New Suggestion X9/X10 to Serve Washington Galleries. Given the fact it can be diverted through washington if high A19 congestion it wouldnt add much time on.
You've got the 4 running to Heworth every 12 minutes, so ample opportunity to connect with the X9/X10 there.
The X1 is timed at 36 minutes during the day Washington to Newcastle, and the X11 on an evening takes 32 minutes, so I'd suggest there'd be no benefit in adding the X9/X10 to the existing X1 links.
The only realistic benefit would be a link to Dalton Park, but I don't really think it's a regular shopping pattern for Washington, so not sure how much use it would get.