(24 Feb 2016, 11:25 pm)Jimmi wrote 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.
Would probably work better to get the 6 from Durham, instead of the X12 and then continue on from Bishop Auckland on the 1 to Darlo or 5/5A until you get bored with that one!