Any question answered...

beckton -> ferry -> woolwich rd -> trafalgary rd -> greenwich high rd -> new cross rd -> peckham rd -> camberwell new rd -> vasall rd to clapham rd.

it's a bit of a stupid question really, obviously it's just that I'm slower than most people (seemingly, everyone) on the forum. bah.

Taking a literal translation of that route starting at Beckton DLR and stopping immediately at Clapham Road, that's over ten miles of commuting. Taking into consideration the ferry, which easily adds at least ten minutes into the commute (loading, sailing, unloading etc) I'd reckon around 50 minutes to an hour would be a reasonable speed.

However, it is a pretty busy route and easy to get tied up in. I would guess that part of the issue is as much opportunism and assertiveness as it is about physical speed.