Driving to Abbey Wood site (congestion charges)

One thing to bear in mind when visiting London is that buses don't take money. You can use your bus pass if you have one but otherwise it is card payment only. Oystercard is one but there may be others.

Fortunately I have a bus pass but because it's from outside London they seem just want to look at it rather than scan it, at least that was my experience when catching a bus from near Abbey Wood. BTW catching the bus from near the Abbey Wood site (fractionally nearer than using the train) takes about the same time as the train to Greenwich and drops you off right in the centre. Train obviously better for going into Central London although if you have a nice day I would recommend taking the Thames Clipper from Greenwich into the City.

On the point about buses not taking cash, can you pay using a contactless card?

David 

I don't know the answer to that as we were lucky last year when we caught the bus to Greenwich. I used my bus pass but the wife has to pay. The driver err...let her off payment! We got the train back. No doubt someone will be along to let us know what cards you can use.

I would only suggest using DK's route if the OP is using the Dartford Crossing that is coming across the bridge Essex into Kent.If not .ie. coming anti clockwise on the M25 or from the east on the A2 then use the directions given in the handbook.

The queue's going north bound (through the tunnel) have not improved at all.