What a difference the new bike makes! The Mekk Poggio, coming in a lot lighter than the Halfords cheap hybrid bike has really helped me speed up and feel less tired!
It seemed to add an extra 2-3mph without any more effort, and I felt a lot less tired at the end of the 10 mile ride.
Of course, with a new bike, it all felt a lot different - hands in different places, gear changes different (and so much easier!) and a bit more unstable with a thin road tyre.