OK so, early morning trip (6:30am) mainly A roads, reasonable traffic Durham up to Otterburn 32.2mpg
Journey back 14:00 light traffic and mostly down bank 36.4mpg, I had peaks of over 42mpg on the longer quiet stretches but final economy was back in the mid 30’s.
The 1.2 petrol manual Yeti would easily do 36 going up and 38-41 coming back.
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!