I just wanted to give a little heads up to non-locals that will be Guardian-ing and need to find their way to the ExCeL Centre each day.

If you're close by, @Goldenballls has a good thread for those looking for walking buddies.

If you're further afield, then you'll probably need to use London's wonderful transport network! While the map might look a little intimidating, its pretty straightforward once you get into the swing of it.

The closest stations to the ExCeL Centre are the handily named "Custom House for ExCeL" and also "Prince Regent", both of which are on the DLR (the turquoise double-striped lines on the right-hand side of the map). The ExCeL Centre is pretty massive, so once we find out which end of the building RTX will be based, you can choose a station closer to where you need to be.

Finding out how to get from your hotel / airbnb / hostel / tent to the ExCeL is pretty easy, just go to the Transport for London Journey Planner, enter the name of your hotel (or the name of your nearest Underground station if you know it) in the top box, and ExCeL in the bottom box, and it'll tell you the fastest route to get there.

IMPORTANT: Don't buy paper tickets when using London transport! They are far more expensive than using the alternatives; Oyster Card or Contactless payments. 

If you have a contactless enabled card, or have Apple Pay, Google Pay or Samsung Pay on your phone, then you are good to go! Just tap your card / phone on the yellow readers at stations and you're done. (Some international cards might not work, more details here).

If you don't have a contactless card / payment app, then you can get an Oyster card instead. The Oyster card is a smartcard that can be topped up at stations and hundreds of shops around London to enable travel. The cards cost £5 (but that can be refunded if you return the card at the end of your trip) and can be brought at stations, or buy one online before you travel and have it mailed to you. Find out more about Oyster here.

Also note that if you're going to use London's buses, none except cash. You must use contactless or Oyster.

Sorry if this is long winded, but hopefully this saves some people from spending way more on travel than they need to - unlike some poor souls from last year who fell into the trap of paper tickets! Feel free to ask any questions if this rambling mess makes no sense!