(30 Dec 2013, 4:46 pm)Tom wrote 29 is replacing the 38/38A, not the 238.
It won't be every half-hour, passenger numbers aren't really good on the services to be honest. More busy from Boldon ASDA to Sunderland, I've been on the X36 a few times, and it normally picks a few up around Downhill and Hylton Red House.
See this scan for the proposal.
Obviously a few things have changed, but not from the 9/X36 etc respect.