Route Advice - SE London to Guildford

Thread hijack... anyone got a favourite route from London (I'll be starting from Lewisham) to Tunbridge Wells? Considering doing this one

but it looks a bit hilly and I really want to do it fixed (48/16 :D)

Maybe I'll just go down the A20 again.

I did this last year: [ame]http://www.bikely.com/maps/bike-path/158182[/ame

Reasonable climb up from Croydon past Sanderstead up to Warlingham. Screaming descent down Titsey Hill. Lumpy through Crockham Hill, Four Elms, Penshurst and Bidborough.

Fine on 46x17 but it did have 200km in my legs already, plus another 300km to do once I got to Bethersden as it was a 600km DIY Audax. ;)