I rode routes 4, 57, 58 and Q1/Q2 (forget which) 3 weeks ago. I liked the refurbished Citaro on route 4 and the London ambience of the Volvo B9TL on route 58.
I also rode route 27 and the Metro through Heworth. 2 days earlier I rode a coach on route X9 too.
RE: Heworth buses