Scoobie - I commute into Scumdon every bloody day. Welcome to the club...
Here's a copy/paste of my current EDC:
Torch (LED lenser - bright) + spare batteries.
Mini Maglight (attached to keys)
Red Bull Shot - BB: 9/9/11
Nature Valley bar - BB: 5/11/11
Sports bar - BB: 27/6/11
Energy bar - BBE: 6/11
A-Z of London
Map of UK roads
Hand sanitizer gel
Hand warmers x 2
Lighter + matches
Compass/thermometer
P-38 can opener
Spork
Tablets + plasters
Paracord
Emergency mylar blankets x 2
Keffiyeh
It all fits neatly in the bottom of my rucksack, and surprisingly doesn't weigh that much at all. The food/drink items and the firelighting/cutlery items are wrapped in separate carrier bags using rubber bands, keeping them in small tight packages.. The flat things (maps, blankets etc.) go flat in the magazine section along my back. I don't notice them at all.
I carry torches as twice I've had to walk through underground tunnels due to break downs. But I'm happy to say that since November I've cycled through London and not had to use the tube at all. Having my bike also means that I can technically get home if all public transport goes up the swanny. The downside of course is if I get a flat tyre - then the bike is just a dead weight.
I don't carry any kind of knife. I've been stopped and searched before at random at an underground station a few years ago, and even a legal one I would be worried about TBH.
I was in London on the day of the London bombings in 2005, which showed me how unprepared I was. I had to borrow an A-Z map from someone at work to walk to my girlfriend's place of work, and then to get across London. No compass, no food, no EDC, nothing. It was an experience that taught me well. The mobile networks were down - so my advice is carry a PAPER map. Your iPhone/Googlemaps isn't going to work on a day like that. Whether they were overloaded or whether it was 'MI5' shutting it down - don't rely on the mobile network. Carry coins for payphones. Have your important phone numbers on a bit of PAPER in your wallet. Most shops and cafes closed on that day, as staff made thier way home. Carry a small food/drink supply to keep you going.
Generally, I think the biggest problem you're likely to face in London is having to get home when public transport has shut down due to terrorism/weather/strikes, so prepare for a long journey. Or get a folding bike...
