OK, I'm off the mark with a couple of half centuries posted. The first was my final ride in Tenerife, basically a 6% climb (and then descent) that went up 1100m without a pause. Less than half the elevation of the Mt Teide climb on New Years Eve but for some reason it hurt more...maybe because I took a side road at the very top which put a 25% sting in the tail!
Still, I can't recommend Tenerife highly enough, so long as you like hills, great scenery, climate, roads and drivers too.
In contrast today's bimble was a sunny, cold and windy meander down to Greenwich, reality has been resumed. Have a great 2018 everyone!