(24 Feb 2016, 11:20 pm)GX03 SVC wrote You'd get as far north as Blyth or Morpeth (43/44 if allocated) on a Pulsar.
7 Newton Aycliffe-Darlington
X66/X67 Darlington - Middlesbrough
21A Middlesbrough - Stockton
X12 Stockton - Newcastle
X9 Newcastle - Blyth
X7/X8 Blyth - Quorum
54 Quorum - Newcastle
X12 Newcastle - Durham
24 Durham - Peterlee
21A Peterlee - Newton Aycliffe
21A is Pulsar operated but does not serve Newton Aycliffe, although I could continue to Stockton or Middlesbrough and wait for a Pulsar on the X66/X67 to Darlington then catch one of the 5/5A, 7 or 8 back to Aycliffe. The 21 does sometimes chuck up a Pulsar though.