Thanks.
I'm sure me and Mrs SG will have no issue with the route. We are just trying to work out how best to pace ourselves over the various sections. Might just pop in a few big hills over the next week or so to be sure lol.
You can have a look here as well:
http://veloviewer.com/segment/615597/Leith+Hill,+northbound
to compare it with the hills you want to climb.
Leith Hill is the toughest climb no doubt but it is not
that horrific. I think most people (dependent on sensible gearing) will be able to get up it in one go or with a few stops. I think the biggest limiting factor will be bike traffic in reality.
The Surrey Hills section is the challenging part of the course. The sections on either side are relatively flat (although there is a sting in the tail around Wimbledon and a few short and sharp inclines in the latter section.)
I think the first 40 miles I will go at a sensible but quick pace. The next 30 will deliberately take it down as that will be the hilly part. That should hopefully leave enough in the legs for the final 30 mile push.
Please bear in mind what I want out of the day is to finish and enjoy the whole experience. I'm not fussed about a "good" time. Should be an amazing day!