B&M toplight line, brake Plus gets brighter when the pulses from the hub dynamo reduce in frequency to be in effect a brake light ..
Maybe a bunch of lights.. Back of your head on down.
I haven't done any road cycling before, so I just want to make sure I'm safe.
so it seems like you are jumping off the 30 meter board into the deep end of the Pool.
maybe the Bus and tube will be safer .. do a lot more rural road riding first, so you have road cycling part down better ,
before going into the maelstrom of the City.
Wear a lot of reflective gear and be super defensive ..
You Join CTC yet? they are the UK Cycling Advocacy Organization on the Cycling safety campaigns. Do That . it's in your intrest.
http://www.ctc.org.uk/cycle-campaigning