I went up by Mount Pleasant sorting office while going from Waterloo to Kings Cross (and back again) and thinking that I wasn't aware of hills in London, even though it felt like one while I had a week's worth of clothes in a pack on my back.
Portsmouth is a great city for cycling in (the council keeps telling us) it's flat and compact but getting out of town is problematical. We're essentially on a sandbank in the harbour, with sea on three sides and a ridge of prehistoric cliffs to the north. The road up isn't too bad as climbs go, now I've gotten used to it, but it's always the first thing I see when heading out as it seems to loom over the city and I'm never quite as warmed up as I would like.