Q: I was wondering how long both your “Royal and Political Walk” and “South Bank Walk” are?

I’m young, and walk fairly quickly.

A: if you start the royal / political walk from westminster tube station (opposite Big Ben), it would probably take you 90 minutes or so to do (just how fast do you walk?! You could perhaps do it in less time, I guess. Its been a while since I last did that walk.)

Then, ending the royal walk back at westminster station, you could simply walk across the bridge to start the south bank walk (near the London Eye), for which I would probably allow 2 – 2.5 hours, again depending on how fast you walk.