Despite not having had any active regens lately, my weekend 70 mile round trip to Hartlepool seems to have done my mpg some good.
Thurs and Fri saw poor mpg of 42.8mpg on my commute. Dark, wet, 10C. Exact same conditions today, but the opportunity to drive a little faster (80mph) on the dual carriageway (a steady 60mph was all that could be managed Thurs/Fri due to slightly higher traffic volumes) and I cracked 47.2mpg for the exact same journey in the exact same conditions (dark, wet, 10C). It will be interesting to see what I get tomorrow with my box attached.