11:00 TCR   11:15 
11:17---Tube---Waterloo  11:22 
11:33---NR---Wimbledon 11:49
11:59---Tram---WestCroydon 12:25
*** lunch (1h?) at east croydon/boxpark
12:33---Overground---CanadaWater  12:47
12:54---Tube---Stratford 13:09
13:24---TfLRail---LiverpoolSt 13:34
13:45---Bus---Bank 13:57
14:15---DLR---RoyalVictoria 14:33
14:46---AirLine---NorthGreenwich 15:04  £3.50
*** 1h break here too if there are any bars open?
*** I think so.
15:24---River---Embankment 16:17  £6.50
16:29---Tube---MorningtonCrescent 16:46
*** Lyttleton Arms

QA: What if I lose the group?

Whatever you do, don't just hang round where you are
waiting for someone to come back to get you.
Continue along the route under your own steam, if you
specifically care about using all the methods.
Alternatively pick a station a couple of hops in
advance and use citymapper to get you there as
fast as possible. Aiming for one of the one hour
breaks would be good too, as we'll be in the same
place for one hour.